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Well This Is My First And Very Sad Post, Im New Here How Ya All Doing
The Thing Is I Have An HTC EVO NO ROOTED And Running Android 2.3.3 My Phone Was Rooted Before But For Some ODD Reason I Decided To UnRoot Ooh And By The Way This Phone Is Flash To Work With Boost Mobile
The Problem I Been Having Lately And I Say Lately Cuz It Been Happening Since Along Time Ago But NOW ITS GUETTING WORSE )= My Phone Keeps Restarting/Rebooting For No Reason Like If Im On A Call Or Downloading Something From The Market Or Watching A Video Online IT Restart By It Self, Today It Did It More Then 20 Times (i know it sounds alot but its true) & It Keep Doing It
My Question Is If There Is Any Way To Fix This Problem Cuz Its Frustrating ); And If Theres Is How Can I Do IT (Remember My Phone Is NOT Rooted & Im Its Running Android OS 2.3.3) So How Can I At least Make It Better For A Lil LOl
Hope Ya All Doing Good And Thanks In Advance
THANKS
I did not understand a damn thing you wrote..is English your second language?..if you unroot it and expect to run on boost...wont work..I think that is what you said
3mdzign809 said:
Well This Is My First And Very Sad Post, Im New Here How Ya All Doing
The Thing Is I Have An HTC EVO NO ROOTED And Running Android 2.3.3 My Phone Was Rooted Before But For Some ODD Reason I Decided To UnRoot Ooh And By The Way This Phone Is Flash To Work With Boost Mobile
The Problem I Been Having Lately And I Say Lately Cuz It Been Happening Since Along Time Ago But NOW ITS GUETTING WORSE )= My Phone Keeps Restarting/Rebooting For No Reason Like If Im On A Call Or Downloading Something From The Market Or Watching A Video Online IT Restart By It Self, Today It Did It More Then 20 Times (i know it sounds alot but its true) & It Keep Doing It
My Question Is If There Is Any Way To Fix This Problem Cuz Its Frustrating ); And If Theres Is How Can I Do IT (Remember My Phone Is NOT Rooted & Im Its Running Android OS 2.3.3) So How Can I At least Make It Better For A Lil LOl
Hope Ya All Doing Good And Thanks In Advance
THANKS
Click to expand...
Click to collapse
well if you are unrooted have u tried to take it back to sprint?....sounds like u could be in line for a replacsment......
the problem you are having is common as far s I know. it is not necessarily related to a phone problem.
It has been happening to me for a very long time and have actually replaced my phone twice because of it and the problem persists. I have found it is because of a low amount of ram. If you have a lot, or even a few programs that are running in the background It will happen more often. I discovered this because I have a program Tasker installed on my phone that kept notifying me I had low memory and soon after my phone would reboot itself. Web browsing, youtube, games.
since I have discovered this I have deleted some of the programs that were not necessary. Lookout was a huge ram hog. if you have a lot of widgets running the likely hood of your phone rebooting is more likely.
You can check your running services by going to Menu - Settings - Applications - Running Services.
There you can see what is non essential and therefore delete, or just live with the rebooting.
I have deleted some of the programs and the frequency of the rebooting is far less.
Hope the info helps.
life64x said:
I did not understand a damn thing you wrote..is English your second language?..if you unroot it and expect to run on boost...wont work..I think that is what you said
Click to expand...
Click to collapse
same here lol
3mdzign809 said:
Well This Is My First And Very Sad Post, Im New Here How Ya All Doing
The Thing Is I Have An HTC EVO NO ROOTED And Running Android 2.3.3 My Phone Was Rooted Before But For Some ODD Reason I Decided To UnRoot Ooh And By The Way This Phone Is Flash To Work With Boost Mobile
The Problem I Been Having Lately And I Say Lately Cuz It Been Happening Since Along Time Ago But NOW ITS GUETTING WORSE )= My Phone Keeps Restarting/Rebooting For No Reason Like If Im On A Call Or Downloading Something From The Market Or Watching A Video Online IT Restart By It Self, Today It Did It More Then 20 Times (i know it sounds alot but its true) & It Keep Doing It
My Question Is If There Is Any Way To Fix This Problem Cuz Its Frustrating ); And If Theres Is How Can I Do IT (Remember My Phone Is NOT Rooted & Im Its Running Android OS 2.3.3) So How Can I At least Make It Better For A Lil LOl
Hope Ya All Doing Good And Thanks In Advance
THANKS
Click to expand...
Click to collapse
u should try to make ur english readable... english is not my first or even second language.... but, u can use google translate... so it doesn't confusing the other,,,,
about this problem, have u installed tasker on your Evo? im not sure about it...
but im trying to figure it out... i have flashed a new rom... it didn't have reboot problem until i installing this apps.... it seems rebooting every one hours... even there aren't task to reboot...
and i did turn off tasker... but, it's still happen....
anyway... im using P920 Lg... i don't know if my problem is exactly the same problem as you...
life64x said:
I did not understand a damn thing you wrote..is English your second language?..if you unroot it and expect to run on boost...wont work..I think that is what you said
Click to expand...
Click to collapse
h4uw1n3 said:
u should try to make ur english readable... english is not my first or even second language.... but, u can use google translate... so it doesn't confusing the other,,,,
about this problem, have u installed tasker on your Evo? im not sure about it...
but im trying to figure it out... i have flashed a new rom... it didn't have reboot problem until i installing this apps.... it seems rebooting every one hours... even there aren't task to reboot...
and i did turn off tasker... but, it's still happen....
anyway... im using P920 Lg... i don't know if my problem is exactly the same problem as you...
Click to expand...
Click to collapse
Hi everyone, please people don't mess with our friend, his english is very good, and understandable, by the way are we allowed to type the "damn" word?, dain, it is very smug to correct someone else when he just express very well, besides someone with his problem we should get his feeling.
BTW Exactly just check how many apps you just dont need and uninstall them.
---------- Post added at 10:10 PM ---------- Previous post was at 10:05 PM ----------
life64x said:
I did not understand a damn thing you wrote..is English your second language?..if you unroot it and expect to run on boost...wont work..I think that is what you said
Click to expand...
Click to collapse
Hi everyone, please people don't mess with our friend, his english is very good, and understandable, by the way are we allowed to type the "damn" word?, dain, it is very smug to correct someone else when he just express very well, besides someone with his problem we should get his feeling.
BTW Exactly just check how many apps you just dont need and uninstall them.
Dear all pro, I have a major problem and tried to solved with Tmobile tech support but they stay away of this issue. My new galaxy t989 bought from Craiglist is not working after a message sent by tmobile for Update my phone. My new phone was working perfectly in two days but now is freeze. I got a message from tmoblie this morning said "congrat, you have an update for your phone, please click Yes", then I click YES and it said "new update will take up to 10 minutes, click OK to start", then I press OK. The screen become White color with blue words " Software Update" and " Loading.." below it. After 40 minutes, it remain a same picture "White color with blue words " Software Update" and " Loading.." below it." I called tmobile for trouble shoot for 1 hour, end up they said this phone is not purchased from their store and it cannot be repair. Please help me to solve this problem, I do not have phone to use it now. Every time when I remove the battery, turn it back on it will show "White color with blue words " Software Update" and " Loading.." below it." Can someone help me please....................
omanpushcar said:
Dear all pro, I have a major problem and tried to solved with Tmobile tech support but they stay away of this issue. My new galaxy t989 bought from Craiglist is not working after a message sent by tmobile for Update my phone. My new phone was working perfectly in two days but now is freeze. I got a message from tmoblie this morning said "congrat, you have an update for your phone, please click Yes", then I click YES and it said "new update will take up to 10 minutes, click OK to start", then I press OK. The screen become White color with blue words " Software Update" and " Loading.." below it. After 40 minutes, it remain a same picture "White color with blue words " Software Update" and " Loading.." below it." I called tmobile for trouble shoot for 1 hour, end up they said this phone is not purchased from their store and it cannot be repair. Please help me to solve this problem, I do not have phone to use it now. Every time when I remove the battery, turn it back on it will show "White color with blue words " Software Update" and " Loading.." below it." Can someone help me please....................
Click to expand...
Click to collapse
I am not an expert by any means however it sounds like it tried to do some sort of OTA update and it didn't stick. If I were in your shoes I wouldn't worry about trying to fix the stock. I would go to the android developement thread and learn how to flash CWM through ODIN. I used the SSGSII tool to root and flash however I know it can be done through ODIN. Then, once you get CWM on there you should be able to flash a custom rom. Maybe even be able to flash a stock TMO rom through ODIN. Again. I am not an expert but it's just my thoughts. I hope this helps.
I would try this.
http://forum.xda-developers.com/showthread.php?t=1513359
I thought I had my phone "bricked" at one point and this got me back in the game. If interested in a custom ROM, definitely check out the Jedi Mind Trick in that same development section. If you just want the stock one to work that link above should help. Good Luck.
Never tell them it wasn't purchased from the store. You should tell them it was by your cousin or some sort, and was given to you. They'll ask for some sort of proof and be like he didn't keep the receipt or anything, tell them you still have the box though, even if you don't. most reps will just brush it off because it was a gift from a relative.
Just be nice to the reps, and if you put them in a good mood they'll more than likely to help. Imagine sitting behind a table doing csr all day and listening to people complain.
Well that's just a tip when dealing with the reps, the part where they ask was it purchased from the store is their easy way of just ending their customer service with you.
Anyways you can just use odin or flash.custom roms to fix your problem
Sent from my SGH-T989 using xda app-developers app
jcnbama said:
I am not an expert by any means however it sounds like it tried to do some sort of OTA update and it didn't stick. If I were in your shoes I wouldn't worry about trying to fix the stock. I would go to the android developement thread and learn how to flash CWM through ODIN. I used the SSGSII tool to root and flash however I know it can be done through ODIN. Then, once you get CWM on there you should be able to flash a custom rom. Maybe even be able to flash a stock TMO rom through ODIN. Again. I am not an expert but it's just my thoughts. I hope this helps.
Click to expand...
Click to collapse
Dear jcnbama, thanks. Can you please guide me where I can get these files? In fact, I am a beginner of doing this not even know what is CWM, but hear ODIN before. Again, many thanks for your help.
Meelocheck said:
I would try this.
http://forum.xda-developers.com/showthread.php?t=1513359
I thought I had my phone "bricked" at one point and this got me back in the game. If interested in a custom ROM, definitely check out the Jedi Mind Trick in that same development section. If you just want the stock one to work that link above should help. Good Luck.
Click to expand...
Click to collapse
Dear Meelocheck, thanks for your information. I did tried to flash the ROM follow by the link above but the "SGH-T989_TMB_1........." doesn't work. I have already send an email to that person asking for help. Do you have any other links or website that I can get another file to try? Again, many thanks for our help.
Teo032 said:
Never tell them it wasn't purchased from the store. You should tell them it was by your cousin or some sort, and was given to you. They'll ask for some sort of proof and be like he didn't keep the receipt or anything, tell them you still have the box though, even if you don't. most reps will just brush it off because it was a gift from a relative.
Just be nice to the reps, and if you put them in a good mood they'll more than likely to help. Imagine sitting behind a table doing csr all day and listening to people complain.
Well that's just a tip when dealing with the reps, the part where they ask was it purchased from the store is their easy way of just ending their customer service with you.
Anyways you can just use odin or flash.custom roms to fix your problem
Sent from my SGH-T989 using xda app-developers app
Click to expand...
Click to collapse
Dear Teo032, thanks for you information. Since Tmobile had a record when I talked to tech support on the phone over an hour, I am not sure if I call them again say this phone was from my cousin that will they believe? Do you have any idea where I can find a most update link/website that with ODIN and Flash ROM? Again, many thanks for your help.
omanpushcar said:
Dear jcnbama, thanks. Can you please guide me where I can get these files? In fact, I am a beginner of doing this not even know what is CWM, but hear ODIN before. Again, many thanks for your help.
Click to expand...
Click to collapse
My suggestion would be to go to the android development section and start reading from the top. There's alot of threads for noobs about ODIN and rooting etc. Just gotta put in the hours and the time learning. It's worth it in the end. CWM stands for Clockwork Mod Recovery.
Sent from my SGH-T989 using xda app-developers app
jcnbama said:
My suggestion would be to go to the android development section and start reading from the top. There's alot of threads for noobs about ODIN and rooting etc. Just gotta put in the hours and the time learning. It's worth it in the end. CWM stands for Clockwork Mod Recovery.
Sent from my SGH-T989 using xda app-developers app
Click to expand...
Click to collapse
Thank again, I will do more search about it.
I have a Sasktell Note 2 and have major problems with the WiFi
When turning it on it will flick on and off then get stuck off, when i mean flick on and of it never fully turns on the on light comes on for maybe a split second then back of and just hands with it not being on or off and not usable.
I have flashed a multitude of roms and put stock rom back on but this problem will not go away and is random, sometimes removing the battery will help and it will work for a few hours or days then crap out again.
Tried and searched even did the copy the old etc/wifi setting over the orginal did not work.
getting close to the point of stamping on it and getting a Iphone:crying:
Thanks for any help
reboot your router...
Factory reset the device and set up WiFi again..
Sounds like a dirty device...
Router reset also as mentioned above...g
Thanks for advice not sure what you mean on router not using a router, im just trying to turn on the wifi on my phone and its not that it wont connect to anything it just wont turn on.
I have done factory resest 1,0000000000000 times and just flashed another 2 roms same problem.
If you are using wifi at your house etc..
Power down the router for your internet connection and reboot it..
This could also be a hardware issue...
It sounds like you have exhausted the other repair options with fresh installs and trouble shooting....g
Thanks no its nothing to do with a router its a phone issue.
Not connecting to router or anything for that matter just turning on wifi on the phone.
Pos is ready be thrown through a wall no one seems to know the reason
Also as wifi button is not working it also means hotspot is not working
Where can I get the original note 2 rom for sasktel every one I find is bell or ata one last ditch at fixing it
stonkeye said:
Thanks no its nothing to do with a router its a phone issue.
Not connecting to router or anything for that matter just turning on wifi on the phone.
Pos is ready be thrown through a wall no one seems to know the reason
Also as wifi button is not working it also means hotspot is not working
Where can I get the original note 2 rom for sasktel every one I find is bell or ata one last ditch at fixing it
Click to expand...
Click to collapse
Sasktel rom but its root injected.
http://forum.xda-developers.com/showthread.php?t=2004650
Sent from my SGH-I317M
jon3sh said:
Sasktel rom but its root injected.
http://forum.xda-developers.com/showthread.php?t=2004650
Sent from my SGH-I317M
Click to expand...
Click to collapse
No worries...
Unroot and reset is easy enough...g
Well downloaded the rom installed it and still no joy
Maybe the phone is just #@%$#@$.
Going to try re-partition see if that makes a difference.
stonkeye said:
Well downloaded the rom installed it and still no joy
Maybe the phone is just #@%$#@$.
Going to try re-partition see if that makes a difference.
Click to expand...
Click to collapse
The device may indeed have a hardware issue...
We will know soon enough I suspect...
Good luck, and be careful....g
Sent from my SAMSUNG-SGH-I317 using XDA Premium HD app
Well tried a few more things and think i screwed it,
It now comes up with baseband unknown and the phone memory has dropped to 0 if i connect to the usb cable I can see the phone on the PC but has odd numbers when it comes to free memory and cannot create anything as says zero memory.
If i go to the phone there is no longer any signal and the memory is at 0 also.
I just re checked odin i think I clicked Nand erase all by mistake ooops
If you did erase the nand....the phone is effectively dead..
Unless you have a full backup to restore your EFS and IMEI #....then it's bye bye note2..
Oops is right....
Ya killed it....g
Edit:
Do you have a backup ??
That part about being careful was no joke....g
No back up so no phone.................
Could I not DL a nadro from online and flash it?
If that's not a option bye Note 2 I would like to say it had been a fun ride but you where a piece of crap and destroyed my trust in Android your brother SGS1 had a hand in destroying it also )
you cant download someone elses nandroid and use it..
sounds like operator error has runied another phone;
dont blame it on Android
I would agree operator ruined it im not blaming it very odd of you to read that from the sentence.
I stated my first android sgs1 no good nothing to do with anything other than the phone, inline mic and usb sound did not work GPS did not work Samsung stated no work around live with it. Note 2 over 6 months of no Wifi or hotspot makes phone useless for me as it is a required feature as country living no internet unless the phone works. Tried fixing and talking about it no joy so had already decided the phone was going in the trash, hence why im not that fussed that it bricked.
Very sorry about the phone...
It's a fine device...but is not a solve all...
No device is....g
Sent from my SAMSUNG-SGH-I317 using XDA Premium HD app
stonkeye said:
I would agree operator ruined it im not blaming it very odd of you to read that from the sentence.
I stated my first android sgs1 no good nothing to do with anything other than the phone, inline mic and usb sound did not work GPS did not work Samsung stated no work around live with it. Note 2 over 6 months of no Wifi or hotspot makes phone useless for me as it is a required feature as country living no internet unless the phone works. Tried fixing and talking about it no joy so had already decided the phone was going in the trash, hence why im not that fussed that it bricked.
Click to expand...
Click to collapse
Try this maybe you can still revive it it was done on S3 so you will just use cf auto root from original dev section and use custom rom for Note ll
http://forum.xda-developers.com/showthread.php?t=1976695
Sent from my SGH-I317M
jon3sh said:
Try this maybe you can still revive it it was done on S3 so you will just use cf auto root from original dev section and use custom rom for Note ll
http://forum.xda-developers.com/showthread.php?t=1976695
Sent from my SGH-I317M
Click to expand...
Click to collapse
Will have a look into that tried but the file to download is not available over use on his drop box site.
Will keep on trying thanks
stonkeye said:
Will have a look into that tried but the file to download is not available over use on his drop box site.
Will keep on trying thanks
Click to expand...
Click to collapse
No i change the link its diff method.
Sent from my SGH-I317M
jon3sh said:
No i change the link its diff method.
Sent from my SGH-I317M
Click to expand...
Click to collapse
Thanks but no joy I can do everything it suggests until it comes to putting something on the Internal mem as its messed up and just shows 0 available.
worth a shot
I have a samsung Galaxy note 2 (sprint) got it flashed to metro PCs everything was OK for about a month.. now I can't get picture mail send or receive I can't get on the play store my internet goes in an out and my phone keeps saying com.Google something.. I'm really frustrated with it can someone please walk me through what I need to do to fix this please!? When I asked the person who flashed it he said it sounds like my os is corrupted please help I'm a beginner but I would like to learn how to do this!
http://forum.xda-developers.com/showthread.php?p=35753067
Sent from my SPH-L900 using XDA Premium 4 mobile app
Still in need of some help please!!!!!
Thank you for responding. I have read alot of posts on here trying to find out which one will help me most but i guess my real problem is that when he flashed the phone i dont know what he did or didnt do so when i read some of these post im lost because i dont know where to start. CAN SOMEONE PLEASE TAKE A MOMENT TO GIVE ME STEP BY STEP INSTRUCTIONS ON WHAT TO DO PLEASE? I really want to use all the functions on my phone. Im a dummy when it comes to this thats why i want to learn......[
So ive got a spint s6, bought from dubai, unlocked and rooted apparently. After a couple of days, my phone woulndt start up cuz it was FRP locked. OK so i searched for the original firmware, i flashed it and my phone booted up again. i flashed also the 5.1.1 and 6.0.1. Here s the thing, on 5.1.1 i can make calls, receive them, receive text messages but i cant send texts at all, so my guess its that its not unlocked anymore. On 6.0 doesnt even have any signal so forget about it. I just want to resolve this issue. I cant find the setting that could help me to change the message center at all, i dont have that option in my phone, i even tried to change things with some adb commands but still nothing. So after all my guess its that the phone isnt unlocked anymore and if so, how do i unlock it? i just cant give the phone back cuz i dont live in dubai, im like a day or so distance with the plane so i just wont go back there again. If anyone could help me...please do so...im on 5.1.1 now, unrooted, i can root, i just cant send texts and i dont have the messages center
oh and also i tried the galaxy tool method from idoneapps which apparently wont work at all and im concerned about paying for that thing if it doesnt work so...yeah
I have the same problem, can't find a solution for months now
Sstylin said:
I have the same problem, can't find a solution for months now
Click to expand...
Click to collapse
Happy someone finally answered. Same problem? I really dont know what the hack its going on. If the god damn phone was unlocked, why wouldnt let you send texts after the odin flash? Maybe i didnt say but the phone was opened in the back and front cuz some elements are not fixed in places. Maybe they unlocked by hardware or smth..
Sent from my SM-G925F using XDA-Developers mobile app
My Guess in researching about this phone let me to this state that u need to unlock ur fone again take it to some software guy have him unlocked ..then try running in MM see if u have any signal i also have this same issue dont have any money to unlock rit now but u can try ..hey if u have any good results do post and share here for this...PS u dont have to go to dubai this model is G920P is US Sprint give it some software guy in ur local area
jinderation said:
My Guess in researching about this phone let me to this state that u need to unlock ur fone again take it to some software guy have him unlocked ..then try running in MM see if u have any signal i also have this same issue dont have any money to unlock rit now but u can try ..hey if u have any good results do post and share here for this...PS u dont have to go to dubai this model is G920P is US Sprint give it some software guy in ur local area
Click to expand...
Click to collapse
Ill try. Ofc i wouldnt go back to dubai cuz i have no possibilities right now. Ill see how to solve this and i will share with you. I was waiting for an answer for do long on this thread but no one gave a damn..
Sent from my SM-G925F using XDA-Developers mobile app
cosmin1112 said:
Ill try. Ofc i wouldnt go back to dubai cuz i have no possibilities right now. Ill see how to solve this and i will share with you. I was waiting for an answer for do long on this thread but no one gave a damn..
Sent from my SM-G925F using XDA-Developers mobile app
Click to expand...
Click to collapse
The vast majority of users on this site are in the US. I'd help you if I could, but as I have replied in other threads on the same topic (and that is a problem too, people keep on opening up new threads) that if I can't reproduce the problem, I can't solve it.
I notice that your signature says "Sent from my SM-G925F." Is that part of the problem? Not a 920P phone?
Factory reset the phone. Then get in touch with [email protected]. hell dire t you on how to resolve. If unlock is your problem he can help.
Sent from my SM-G920P using XDA-Developers mobile app
koop1955 said:
The vast majority of users on this site are in the US. I'd help you if I could, but as I have replied in other threads on the same topic (and that is a problem too, people keep on opening up new threads) that if I can't reproduce the problem, I can't solve it.
I notice that your signature says "Sent from my SM-G925F." Is that part of the problem? Not a 920P phone?
Click to expand...
Click to collapse
Nono thats not a problem. I got a galaxy s6 edge which im using daily, its perfect. The s6 with an issue is my sister's. A factory reset wont do anything. I did that enough times already. The messages jsut dont seem to work at all and i dont find any solution. Also, i didnt find a thread with this problem and if there is, im sorry for bothering with this. I just need help..
Sent from my SM-G925F using XDA-Developers mobile app
Saafir said:
Nobody is OBLIGATED here.
Click to expand...
Click to collapse
If you dont wish to help, dont bkther commenting ok?
Sent from my SM-G925F using XDA-Developers mobile app
cosmin1112 said:
Ill try. Ofc i wouldnt go back to dubai cuz i have no possibilities right now. Ill see how to solve this and i will share with you. I was waiting for an answer for do long on this thread but no one gave a damn..
Sent from my SM-G925F using XDA-Developers mobile app
Click to expand...
Click to collapse
Cosmin1112 try atleast getting to fix the sms issue either downgrade to 5.11 or 5.0.2 and sell ur fone..i said before i had the same issue like urs i sold my s6 bought LG G4 H815.. Now im running on marshmallow with 2 days standby time...im loving every second of it.. U should do too..G4 is actually cheaper then S6 so ur in luck
cosmin1112 said:
So ive got a spint s6, bought from dubai, unlocked and rooted apparently. After a couple of days, my phone woulndt start up cuz it was FRP locked. OK so i searched for the original firmware, i flashed it and my phone booted up again. i flashed also the 5.1.1 and 6.0.1. Here s the thing, on 5.1.1 i can make calls, receive them, receive text messages but i cant send texts at all, so my guess its that its not unlocked anymore. On 6.0 doesnt even have any signal so forget about it. I just want to resolve this issue. I cant find the setting that could help me to change the message center at all, i dont have that option in my phone, i even tried to change things with some adb commands but still nothing. So after all my guess its that the phone isnt unlocked anymore and if so, how do i unlock it? i just cant give the phone back cuz i dont live in dubai, im like a day or so distance with the plane so i just wont go back there again. If anyone could help me...please do so...im on 5.1.1 now, unrooted, i can root, i just cant send texts and i dont have the messages center
oh and also i tried the galaxy tool method from idoneapps which apparently wont work at all and im concerned about paying for that thing if it doesnt work so...yeah
Click to expand...
Click to collapse
Sent from my LG-H815 using XDA-Developers mobile app