[Q] Evo won't stop randomly rebooting and having USB problems - EVO 4G Q&A, Help & Troubleshooting

Hey guys, so lately I've been having this really annoying problem where my Evo won't stop rebooting at random times. It usually happens when:
I'm using an app with data or a game
Right after a reboot I unlock my phone and wait 3 seconds and it reboots again
I noticed that the phone does get hot, but i only left it in my car once so this isn't always the case, although this has started recently maybe it is the heat who knows?
Some of the causes i've eliminated are the rom (thought it was just CM7 but it also happens on Fresh), the kernel (tried stock and savaged zen), and the battery (my primary is an EXTENDED BATTERY I BOUGHT ON AMAZON, thought that this was the problem but the reboots happen on the stock battery as well).
I guess this can come only come down to the hardware, which i guess makes sense because I don't think data transfer through usb is working for me anymore either, or it works sporadically. The phone charges fine on the wall, but when i put it into my laptop every usb port caused my Evo to keep unmounting the sd card. <--- I think the usb port is broken or loose because moving the cable seems to get my Evo to transfer data to my laptop for a short while.
If anyone can help me or have the same problems and have a solution that'd be great because I;m really close to unrooting and going to a sprint store if this keeps up

I wrote a response to someone else who had this question. I should have copied it so I can repost it for people.
What I know is this. I have had 3 different evos and they have all done this. It might be a battery problem, but more likely it has to do with low memory/ram.
If I play a game, watch youtube videos, surf the web, or just about anything somewhat intensive, my phone reboots.
I have tried many times, and things, to figure out what has caused this and the only consistent is that I am low on ram.
I use the application Tasker, and it notifies me when I'm getting low on "memory" it then tells me to go to Menu - Settings - Applications - Running Services. from there you can see what is eating up your ram and quit it, or delete it. I have deleted some of the programs and my phone still reboots, but not as often.
If you have widgets running that seems to add to the problem.
The phone reboots to gain back the system ram it needs to work properly.
If I'm wrong, will someone PLEASE correct me and tell what is actually going on.
This is what I have found. Someone else may have a different idea of what may be going on, but this makes more sense than anything else I've heard or read.
Sent from my PC36100 using XDA App

Related

t-mobile HTC desire won't shut down

apologies if this is covered elsewhere.
anyone else got this problem. I read somewhere its quite common. My Desire will not shutdown. everytime I have to hard reset by removing the battery. If I shut just after it has started it will work but after a short length of time if I try shutting down it will not.
This is quite annoying. I'd rather not send back if I can avoid it. I recently received an OTA update from HTC but this did nothing for it.
I also have the problem with application launcher but quick uninstaller is a satisfactory work around. otherwise a great phone which I would recommend to anyone apart from this issue.
I had a very long shutdown time took several minutes to turn off. As I removed (see my comments regarding memory) most of the apps I had installed myself this prob is gone. So it must have been one of the apps that didnt allow the device to turn off.
Its as Jannen said, Have you ever experienced a long shutdown with windows? Its exactly the same thing with Android. Sometimes it struggles to shutdown the OS efficiently. I think its something we are going to have to live with, or you can get a task killer (app manager) and kill all running tasks before you shut down your phone.
But i must say it has not happened to me since i have been using helixlauncher2, so it may be a Sense problem?
JD
ok I treid killing all processes on taskos (except sense which is in the ignore list) and it shut down in about a minute. guess I can live with that...
android is a bit windowsy at times. But in a good way if you know what I mean. love the customisations and can live with the occasional process crashes etc... that this means
yeah had the same problem, sometimes it takes about 10 minutes to shut down.
sometimes killing all apps works, tho sometimes it doesnt.
someone also said to unmount the sd card first.

Evo reboots during use

Weird problem, had my Evo for a couple of days now and everything seemed fine for the first day but now when I run certain apps like google maps for pandora my Evo will reboot. This doesn't happen all the time but will eventually happen after an hour or two of usage. I did buy a case for my phone, maybe it's a heat issue?
taziz23 said:
Weird problem, had my Evo for a couple of days now and everything seemed fine for the first day but now when I run certain apps like google maps for pandora my Evo will reboot. This doesn't happen all the time but will eventually happen after an hour or two of usage. I did buy a case for my phone, maybe it's a heat issue?
Click to expand...
Click to collapse
I've had this happen on my hero. It is just clearing memory are you using autokiller ? It started on my hero when using autokiller. It's not a heat issue the led will flash red and green when the phone is hot.
I'm using advanced task killer but I don't think it's set to autokill apps. A hard reset has seemed to fix this issue for now, how do I ensure it doesn't happen again in the future?
It might help to check your preset in autokiller and set to moderate or optimum but some apps use more memory than others so you might see it from time to time. I still use autokiller set on extreme and would only see that once every week or two on the hero. So it's not that big of a deal. You could just uninstall it if it bugs you or to see if it stops. I have not seen it on my evo yet but I am just rooted no custom ROM yet (Waiting for fresh ROM with espresso theme). That might help contribute to it as well.
taziz23, I don't mean to hi-jack your thread but I've been chasing down the cause of random reboots also. I've been searching around for someone with a similar issue and all I've been finding are people talking about the reboot loop caused by an exchange account. I'm not using exchange at the moment so I know that's not what's affecting me.
It sounds similar to what you're talking about. About 30 minutes to an hour apart regardless of whether I'm using the phone or not. It just did it while sitting on the desk next to me with the screen off for at least 15 minutes.
I've hard reset a few times to see if it was related to the OTA, and turns out it happens to both .1 and .6
I've found out that if I don't associate my google account during the initial setup (or any other accounts like facebook, twitter, etc.) it doesn't seem to reboot anymore. Once I do setup an account and set it to auto sync, I start seeing the reboots happening. So I've been playing with different combinations of disabling calendar sync, contacts sync, etc. to narrow it down but so far, I've come up with nothing.
I've even exported my contacts to a .cvs file using my desktop browser and cleaning out any of the <HTCDATA> stuff that links facebook and twitter to make sure nothing is corrupt and reimported them, but as the reboots are still happening, it looks like that might rule out contact corruption.
I had made it through most of Friday before the reboots started. I recall installing the update to Facebook and TasKiller just before it started happening, but have hard reset since then and have not installed either of these again.
Has anyone else seen anything like this?
Two words: Kernel Panic.
Actually, that's just a guess. I'd imagine anything else would cause some kind of error message to show up like a force close for example.
It has happened with my Evo a few times so far. It also happened with my Hero when I use to use that.
It's probably just a module misbehaving which confuses the OS and causes the kernel panic, so I imagine it's nothing more than a software bug.
Yea... I was thinking some KP's might be happening, but if the release build is dated in April, I must have some fluky hardware right?
Maybe I'll run an `adb logcat` and just wait.
I remember the hard crashes on some of the early donut and eclair builds for the Vogue (CDMA Touch) and these are pretty much the same deal. Just drops out and goes straight to the bootsplash.
Regardless of the phone or OS, I've seen this happen on all the phones I've owned. Android is at least open to allow normal people to debug and fix these problems though.
Me too!
I had a seemingly random reboot happen today on my EVO as well... then it happened again.
Both times, I had Waze and Pandora running and was about 30 seconds into a phone call.
Advanced Task Killer is installed, and is set to kill "when screen off".
I'm pretty new to Android based phones, so I'm not even sure where to start with troubleshooting... but found this thread, and thought this info may help.
Krissy
(P.S. I love this phone so much, right now - I don't even care that it has rebooted on me twice in the middle of a phone call... but eventually the honeymoon will be over, and I'll want this figured out. LOL)
I am having an exact same ISSUE i got it from google I/O its just happened suddenly while you are using it I have no Idea .. Search is also not that great .. Platform need lot of work until it get mature .... I was definately enjoying 1st 2 weeks but not anymore its just killing me now ... Issues after Issues so many Bugs I have start noticing now.. I am not complanning but its just not solid they need to fix this asap... I was enjoying Pre it was slow but I like that OS .. not too much buggy... some apps just Crash randomly .. I was huh .. and its doing more and more now ..
After my hard reset a couple of days ago I haven't had any reboots. I do think it was related to the task killer I think it might have caused some data corruption possibly when killing an application. I set the auto killer to safe in the meantime. If it stats happening again I'll try uninstalling the task killer before I hard reset.
I had the same thing happen, but only once. I was using google maps I think. I also have advance task killer installed. Does the ignore list in advance task killer and setting it to auto kill, kill everything except for what's in the ignore list?
I'm not sure but I did notice that most of my reboots were happening when running google maps..
My Evo rebooted most days 4 or 5 times, day or night, in use or not. The store where I purchased it refused to replace it since I couldn't duplicate the problem to the local technical store. They acted like I needed someone to talk to and not like I had a problem needing resolution. After about 20 calls to customer support they told me to return it where I purchased it and they're sending me out a new one. Apparently no one at Sprint has ever heard that there's this issue. Mine was stock. Period.
I have had some reboot issues that I can't explain. I removed Advance Task killer and it seems to happen less frequent. Maybe once every two days, but never during a call. Waiting to see if this stops with Froyo.
Used to have similar, but less frequent, reboot issues and an occasional "frozen" screen with my previous Blackberry 8830.
I've only had it reboot once or maybe twice for no reason but When I use advanced task kill I almost expect it to happen. And I only use it to kill whatever app I was just using and any other ones Ive downloaded that have no business running.
I have had the same issue, only I am using the full version of Memory Booster..I am going to uninstall it and see if that helps, I also notice that my phone was very hot. It rebooted about 3 times before letting me use the phone again.
Any other suggestions?
Sent from my PC36100 using XDA App

Random Restart

So far today, my Evo has reset itself about 4 times. That is within the past hour and a half. I've had it since Monday and had no other issues with it doing this until today. The only app that was added in the past 24hrs was the Wireless Tether for Root app. I don't know what or why this is happening. I've just uninstalled Unrevoked, Superuser Permissions, the Overclock Widget, and the Wireless Tether to see if that is causing the issues. Anyone else have anything similar to this happening?
Also, I changed the "always on mobile data" setting to off yesterday. That increased my battery life dramatically. I was able to leave the phone on for a solid 11hrs with it still having 60% charge left. Then today, before I changed any settings at all, unplugging the phone from the charger for about 2hrs has resulted me in being down to 45% battery. Could mobile data always on being off cause the rebooting issue?
Same thing was happening to me when I unchecked that. Checked it back and all rebooting issues went away.
admorris said:
Same thing was happening to me when I unchecked that. Checked it back and all rebooting issues went away.
Click to expand...
Click to collapse
Since I posted that message I had two more reboots. Just ticked always on mobile data back on and am waiting to see if that stops it...
EDIT: No more reboots since reenabling mobile data always on...weird
I've had the always on data feature turned off since day one to conserve battery life and i had not experienced the random shut offs until yesterday. Since yesterday however my phone has restarted itself no less than 20 times. Several times while I was sleeping so this is defiantly a real problem but I dont think its related to settings. ill be contacting HTC tonight
I have had always data off, ticked it on this morn. And started getting the reset issue...
-------------------------------------
Sent via the XDA Tapatalk App
Random restarts are often indicative of the battery not sitting in properly.
Remove the battery. Scratch up the contacts. Insert back firmly...
I am also having this same issue. I turned my phone off this morning because i wouldn't be using it and then i turned it back on in the afternoon and then my phone just started randomly restarting itself. There is no rhyme or reason to it. It has just been happening all by itself. It has probably happened 10 times in the last 4.5 hours.
I took the battery out for a minute and put it back in to see if it will stop the issue, but i'll have to wait and see. However, when i did turn the phone back on i got a weird pop-up message on the main screen that said something to the effect of, "Operational failure, please use su command." Then it faded away. Anyone know what that means?
As mentioned above, turning always-on mobile back on, took care of my restart issue.
heed316 said:
So far today, my Evo has reset itself about 4 times. That is within the past hour and a half. I've had it since Monday and had no other issues with it doing this until today. The only app that was added in the past 24hrs was the Wireless Tether for Root app. I don't know what or why this is happening. I've just uninstalled Unrevoked, Superuser Permissions, the Overclock Widget, and the Wireless Tether to see if that is causing the issues. Anyone else have anything similar to this happening?
Also, I changed the "always on mobile data" setting to off yesterday. That increased my battery life dramatically. I was able to leave the phone on for a solid 11hrs with it still having 60% charge left. Then today, before I changed any settings at all, unplugging the phone from the charger for about 2hrs has resulted me in being down to 45% battery. Could mobile data always on being off cause the rebooting issue?
Click to expand...
Click to collapse
I'm getting the same issue. At first i thought it was ATK, so i uninstalled that. Then I though it was lookout, so I disabled that. But it still keeps happening. I have mobile data off too, but for days, and it hasn't affected it one way or the other.
The odd thing is, I was running xiiLive Lite last night streaming the radio all night, and my phone stayed up the whole time, while plugged in (at least 8 hours).
I don't know what the deal is, but my phone goes about 24-48 hours without a spontaneous reboot, and then it will start doing it 4-6 times a day. Anyone have a good logging tool would be nice, as I'm somewhat new to Android.
Thanks!
Tigger
tigger2u said:
I'm getting the same issue. At first i thought it was ATK, so i uninstalled that. Then I though it was lookout, so I disabled that. But it still keeps happening. I have mobile data off too, but for days, and it hasn't affected it one way or the other.
The odd thing is, I was running xiiLive Lite last night streaming the radio all night, and my phone stayed up the whole time, while plugged in (at least 8 hours).
I don't know what the deal is, but my phone goes about 24-48 hours without a spontaneous reboot, and then it will start doing it 4-6 times a day. Anyone have a good logging tool would be nice, as I'm somewhat new to Android.
Thanks!
Tigger
Click to expand...
Click to collapse
I had mobile data off for a few days with no reset issues. Then I installed a few apps from the market (not the ones you mentioned) and then the resets started. I uninstalled the newest apps but the resets kept happening. Then I turned mobile data back on and no more resets in the last 24 hours.
my evo is randomly rebooting and I never modified the settings that some of you are talking about. My also gives me random issues where when i try to open an app it will open for a split second and close? I am also having my phone lock up on me several times a day and i have to pull the battery to reboot it! I took it back to the sprint store and they insisted on reloading the software on the phone and it made no difference.... does anyone have any suggestions or similar issues?
rooder said:
my evo is randomly rebooting and I never modified the settings that some of you are talking about. My also gives me random issues where when i try to open an app it will open for a split second and close? I am also having my phone lock up on me several times a day and i have to pull the battery to reboot it! I took it back to the sprint store and they insisted on reloading the software on the phone and it made no difference.... does anyone have any suggestions or similar issues?
Click to expand...
Click to collapse
I had the apps closing after a split sec too but I found out that it was for apps that didn't play nice with the snapdragon cpu; like the Gameloft game Nova and a few of their other titles.
for me its stock apps like the navigator, video player etc. I am thinking i might have a defective unit.
rooder said:
for me its stock apps like the navigator, video player etc. I am thinking i might have a defective unit.
Click to expand...
Click to collapse
Yup! That does sound strange! Did you root your phone? I'm rooted and all the stock apps that I've tried, seem to open and work fine.
nope! not rooted, 100% how it was out of the box. Luckily my pre was still active so i video taped it freezing up and stuff so im going to show the tech at the sprint store so hopefully they can order my replacement.
I also have a fully stock phone, some apps installed, but none recently, and yesterday it rebooted itself, twice more today.
I haven't changed the settings mentioned earlier, and haven't done anything I can think of that would cause the rebooting.
I am also having issues where I can't get an IP address on my wireless network, but I'm not sure it's related. I just noticed these 2 problems in the last 2 days, and it's the only thing I can think of that's out of the ordinary from the weeks prior to this happening.
I think I'll take it to Sprint tomorrow and see what they have to say.
Keep us updated on what happens. It seems to take a day or two for symptoms to start, but when they do it goes crazy rebooting!
...more discussion on this issue has been going on here too: http://forum.xda-developers.com/showthread.php?t=702379
I'm not a professional android user and don't know much about it yet, but mine's rebooted a few times as well. I haven't rooted my phone but the ONE thing that seemed to have resolved the continuing issue is doing a hard reboot:
Menu > Settings > Privacy > Factory data reset
It's been 4 days and hasn't rebooted since.
EDIT: It's been 6 days now and still no reboots.
Angry Apps Eating my RAM!
I think what everyone is missing here that maybe the root of the problem is low memory.
I'm not talking about storage on the SD card. I"m talking about the memory the OS has to run.
I've fought long and hard with this low memory problem seeing as I have owned a g1 for almost 2 years.
THERE IS NO REASON THE EVO SHOULD EVER GET DOWN TO UNDER 30MB OF SYSTEM RAM!
I equate this issue to the same issue many people had with Windows computers and applications that start up in the system tray! We don't need most apps to run in the back ground on start up just in case I want to use it. The few seconds of time it shaves off of starting up the app is not worth the slower OS boot up (applies to Windows mainly) or the major slow downs they cause the OS's to have.
I don't need Sprint TV running on boot!
When I used a clean slate scene I still have all of these same issues. Random reboots, slow OS and apps, ect.
I have no idea why Android would allow that much RAM to be used for background apps. I don't understand why we have no way to see what programs run on boot unless using a 3rd party app.
Most apps are so crappy that they run in the background all the time and have no way to toggle if they run on boot and I'm not talking about apps that modify something all the time I"m talking about apps that ONLY need to be running once you open them. An example would be Swipe, I understand the need for that app to run on boot. It modifies the OS keyboard and would need to be running in order to work correctly when ever you enter any text field that pops up the keyboard for input.
An example of programs that don't need to be running on boot or should at least give you an option to toggle boot start up are; Sprint Navigation, Sprint Updater (No idea what this is for), Updater (Android?), Sprint Zone, doubletwist, SprintTV Widget (I'm on the clean slate profile with NO Widgets), VoiceMail (I use Google Voice, is this needed?), Sprint Football Live (It's not even Football season!), MP3 Store (I have yet to use on the EVO but is running just in case, thx), as well as many others.
I have 35 apps running in the back ground! WTF? Thanks ****ty app devs and bloatware Sprint!
Have fun try to find options for each app and figuring out each service to know what it's tied to so that you can have a phone that it powerful and run smoothly.
It really shouldn't be this hard or as much of a pain...
Reeves360 said:
I think what everyone is missing here that maybe the root of the problem is low memory.
I'm not talking about storage on the SD card. I"m talking about the memory the OS has to run.
I've fought long and hard with this low memory problem seeing as I have owned a g1 for almost 2 years.
THERE IS NO REASON THE EVO SHOULD EVER GET DOWN TO UNDER 30MB OF SYSTEM RAM!
I equate this issue to the same issue many people had with Windows computers and applications that start up in the system tray! We don't need most apps to run in the back ground on start up just in case I want to use it. The few seconds of time it shaves off of starting up the app is not worth the slower OS boot up (applies to Windows mainly) or the major slow downs they cause the OS's to have.
I don't need Sprint TV running on boot!
When I used a clean slate scene I still have all of these same issues. Random reboots, slow OS and apps, ect.
I have no idea why Android would allow that much RAM to be used for background apps. I don't understand why we have no way to see what programs run on boot unless using a 3rd party app.
Most apps are so crappy that they run in the background all the time and have no way to toggle if they run on boot and I'm not talking about apps that modify something all the time I"m talking about apps that ONLY need to be running once you open them. An example would be Swipe, I understand the need for that app to run on boot. It modifies the OS keyboard and would need to be running in order to work correctly when ever you enter any text field that pops up the keyboard for input.
An example of programs that don't need to be running on boot or should at least give you an option to toggle boot start up are; Sprint Navigation, Sprint Updater (No idea what this is for), Updater (Android?), Sprint Zone, doubletwist, SprintTV Widget (I'm on the clean slate profile with NO Widgets), VoiceMail (I use Google Voice, is this needed?), Sprint Football Live (It's not even Football season!), MP3 Store (I have yet to use on the EVO but is running just in case, thx), as well as many others.
I have 35 apps running in the back ground! WTF? Thanks ****ty app devs and bloatware Sprint!
Have fun try to find options for each app and figuring out each service to know what it's tied to so that you can have a phone that it powerful and run smoothly.
It really shouldn't be this hard or as much of a pain...
Click to expand...
Click to collapse
This is where I am so lost with Android. I read many blogs saying Android does not need a task killer and using one will only make your system slow down. Well I tried one anyway because it's in my Windows Mobile nature to do so (old habits....). I noticed that I too had 35 or so apps running in the background and I thought that doesn't sound good, I wanna kill them all. But then what Android pros keep telling me is to let them be and that the OS will kill them as needed. But from what you're saying, it sounds like the OS doesn't always do a good enough job. So my confusion and learning process of Android continues......

[Q] replacement battery problems (not related to quick draining)

hey,
so my girlfriend has a droid incredible, not rooted, and many times when she switches to her bak up battery AND BACK, her apps delete. many times she has to re-download her apps and they're not even listed under her apps in the market. she turns off the phone before ripping the battery out and changing it, but she still has the issue. the battery is supposedly OEM, and purchased off eBay. its black considering its an evo battery and it reads HTC innovation on the battery. in any case, as i mentioned before, it happens when she switches back to her regular battery as well. in addition the widgets read "problem loading gadget". (obviously because the app has deleted)
anyone have any solutions to solving this or why this might e happening. to my understanding these batteries should yield no problems. also, this is not the first time this has happened it has happened alot. perhaps if there is no direct solution, maybe i can find an app to make sure none of my apps get deleted during the transfer process? let me know,
thanks
if anyone can help i also have minor issue on my dinc with the generic batteries i ordered from ebay that when i plug it in, the battery has an exclamation point. anyway to get rid of this? its not too annoying because i use mini info widget anyway, but id rather have it solved.
thanks again
m
If they're on the SD card it'll often take a few minutes for it to load up.
The problem looks like it's from the SD card, maybe it's having some issues or maybe she's accidentally knocking it out of place when she switches batteries.
POQbum said:
If they're on the SD card it'll often take a few minutes for it to load up.
The problem looks like it's from the SD card, maybe it's having some issues or maybe she's accidentally knocking it out of place when she switches batteries.
Click to expand...
Click to collapse
the problem seems to be deeper than that. shes definitely not knocking out the sd card cuz its always stable. besides this is a problem for every app thats not stock. she doesnt have ALL apps2sd anyway.
if it helps.. some apps stay some apps go, but for the ones that stay, they force close. ie. hopstop wasnt deleted but FC. in addition she would re download twitter and that would FC. to confuse you even more shazam was not deleted or reinstalled but still works (all data was deleted tho)
Sounds weird. I know this is a long shot that you will actually try it, but it sounds like it'd be a good idea to reinstall that phone.
It's been known that there are a couple of mallicous apps (now removed from the market) but it's *possible* she may have downloaded one of them and that is causing a lot of the issues. It may just be some weird data corruption in important system files, it's hard to tell with just what you're telling me but as long as she doesn't mind it- reinstalling with a fresh ROM and kernel would be a good start and likely will fix the problem.
Apps can still be backed up via titanium backup, and there's apps for backing up messages and you can sync contacts to either verizon or your google account.
Just a thought.

[Q] Epic 2.3 - Random daily lockups and very hot.

I have a Epic that I did the FroYo update to months ago. Now it seems that at least 3 times a day I notice my leg burning, letting me know that my phone is locked.
I know it's most likely some 3rd party application on the phone but can anyone let me know how I can debug the problem rather then reset the device to factory? I also want to be able to let whatever developer of whatever app know whats up.
I also get the other random lockups where nothing will work but the bottom buttons will light up. both will happen on or off the charger.
xboxor said:
I have a Epic that I did the FroYo update to months ago. Now it seems that at least 3 times a day I notice my leg burning, letting me know that my phone is locked.
I know it's most likely some 3rd party application on the phone but can anyone let me know how I can debug the problem rather then reset the device to factory? I also want to be able to let whatever developer of whatever app know whats up.
I also get the other random lockups where nothing will work but the bottom buttons will light up. both will happen on or off the charger.
Click to expand...
Click to collapse
Personally, I would start over. Wipe everything and reflash the rom. I reflashed the rom twice. The first time I had a few issues, the second time made the phone smoother. Also the second flash was with no wipe.
xboxor said:
I have a Epic that I did the FroYo update to months ago. Now it seems that at least 3 times a day I notice my leg burning, letting me know that my phone is locked.
I know it's most likely some 3rd party application on the phone but can anyone let me know how I can debug the problem rather then reset the device to factory? I also want to be able to let whatever developer of whatever app know whats up.
I also get the other random lockups where nothing will work but the bottom buttons will light up. both will happen on or off the charger.
Click to expand...
Click to collapse
Since you are on Froyo (didn't say if you were rooted or not) you can run some apps like Spare Parts, OS Monitor or CPUSpy to see what is running. You can also go to Settings>applications>running services to see what is running and actually stop applications there. So if you check running services and see a third party app running that you are not using, stop it and see if the phone runs OK. Another thing you could try is to set all syncs to manual such as Facebook, Twitter, Google talk or +, email...applications trying to sync in a low signal area may cause excessive heat and the heat itself will cause FCs, freezes and reboots as the phone has a battery temp safety in it.

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