The following scenario has happened exactly four times by now:
I use two SIM cards, one in Estonia and another in Finland. I visit Finland every weekend or every other weekend, depending on scheduling. When I visit Finland then I use pre-paid SIM card that I load with credit in order to use unlimited mobile internet the same way I use at home.
When I visit Finland I swap by Estonian SIM card to Finnish one and when I return I swap it back.
Problem is that exactly after six SIM card swaps, Google Cloud to Device Messaging service stops working and Galaxy Nexus blue connection bars stay permanently gray. This means that push notifications will not work and gTalk cannot connect at all. Other Google services - including Market/Play - work well if they can function without C2DM.
After such an event I have to restore my device to factory settings each and every time. After I do this, the device starts working again. So far I have not found a way to get C2DMA working without having to factory reset my device. The device has no developer or other rogue apps installed that might affect this in any way.
Clearing data of Android Messaging Service and other background Android services has not helped. Rebooting has not helped. Changing from data to WiFi, or to Airplane mode and back, has not worked.
My best guess is that this is some security or whatnot validation in Android code. Before Android 4.0, whenever you changed your SIM card (which I did just as frequently on my HTC Desire), it asked for your Google Account password, after which C2DM worked.
But ever since Android 4.0, your password is not asked and the C2DM stops working after exactly six SIM swaps. I know that it is exactly after SIM swaps by checking my schedule and gTalk chat logs, where I have made notes of this.
I have reported this bug and looked for a solution for this before, but have not gotten an answer. Has anyone run into such an issue or knows what I could try to restore C2DM connection without having to reset my device again? I know that the problem is very custom and thus most users never face this issue, since swapping SIM cards this often is rare.
Wow, this is insane. I actually worked it out! I had reset my phone THREE TIMES in the past handful months because of this!
Apparently what happens that there's a bug in Android that switches SIM card setting after multiple SIM card swaps. Android stores SIM card related settings internally somewhere, but apparently has a bug in restoring those settings after certain amount of SIM swaps.
I went to Mobile Networks menu and from there to Access Point Names and for some reason Android had switched to WAP service instead of the mobile internet one. This is a setting I had never changed and it's happened four times by now.
If you run into the same problem or your C2DM suddenly appears, then you should look at those settings first and foremost.
Related
I have a annoying problem with the inbuilt Google Talk app on my Desire.
When I turn the screen off Google Talk disconnects from the server and I don't receive any new messages until I turn the screen back on. Google Talk displays a message saying "Lost connection to server. Messages will be sent when online".
I have "always-on mobile data" active in my network settings. Have tried to disable the automatic away status and even resetting the phone to no avail. I have also created a new Google account and that hasn't helped either.
I use my phone on the Aussie 3 network. Can anyone else with Desire on the Aussie 3 network tell me whether or not theirs is doing the same? Also my Desire is the Aussie Telstra branded one.
Just to note the only way I can use Google Talk properly is if I use eBuddy. eBuddy does not disconnect when the screen is off.
Hi danielhtc,
How did you go with solving this problem?
I too have a HTC Desire and use the 3 network in Brisbane. All was working fine with Google Talk up to a few weeks ago when I started noticing that I would just loose connection. Not sure if the problem started immediately after the Froyo update, I wish I paid more attention now.
Using the GTalk Service App from the market I see that I'm loosing connection all the time. At first it appeared to be random, and know it is almost everytime the phone screen locks.
I spent hours trawling the net and still have no answer. I have flushed the cached data for Talk, Factory reset the phone and even tried a new Gmail account with a factory reset of the phone, all to no avail.
I've talked with 3 and they calim they can't do anything to help me figure out what is going on as it not a 3 Australia supplied handset so no guarantees etc..
Strange thing is that it was working fine for months, and then all at a sudden problems... At the moment my money is that 3 has done something to their data network, however it still could be an issue with the phone. Unfortunately until I can try my account with a new Desire I wont know for certain.
galeap
Hello guys!
Hopefully you can help me with this one. Since 2 days ago, my GNex stopped being able to connect to my current carrier: Koodo (Telus' affiliate brand here in Canada). Now I initially thought it was a problem coming from the company's SIM card, and that it would've been relied to the Rogers shortage that occurred a couple days ago, but it wasn't. The symptoms are simple, no way to connect to the carrier. It happened randomly as I did not perform anything unusual with the phone, aside from connecting it via USB to my computer (which I often do). It does recognize that a SIM card is inserted and that Koodo is indeed a carrier, but when I click on it in my Network Operators menu, it tells me it can't connect and to try again later. When I click any other carrier, it says the same. So far here are the steps I took, with no success.
1. Removed both battery/SIM for a minute or more then rebooted. (Also made sure that 2G was off)
2. Called a Koodo tech guy who updated the SIM.
3. Went in store to try and put my SIM in a different phone, SIM worked fine.
4. Lady tried installing a different SIM card (her own), still same problem. Tried a brand new one, still not working.
5. Backed up my pictures and factory reset the phone. Same problem.
6. Took SIM out, and the phone does recognize there is not a SIM card and now the phone gives me the NO SIM CARD message at unlock screen.
7. Tried clearing the "Google Services Framework" cache, then update the phone but no update is found after multiple attempts.
8. Browsed the internet for hours then cried myself to sleep, hoping someone would help me out eventually.
By the way I'm using the same SIM in a different phone right now, and it works flawlessly. The phone was purchased on the Play Store and is factory unlocked. It is unrooted, and it was running 4.2.2 and now runs 4.2.1
Thanks!
Recently purchased a new, unlocked S8+ and got a new SIM from Verizon. This was approximately 2 weeks ago. Zero problems up until this week. I have been on 4 flights this week - before each flight, the phone works great. When I land on the other end, Verizon LTE pops right up, varying numbers of bars as one would expect depending on arrival airport, just like it would normally when I have service and can do everything. However, nothing. No texts, no calling, no data. Tried toggling various things, resetting, nothing for a hour after that, all the while I've got 3-4-5 bars and I can see the data arrows lighting up like there is upload/download transfer.
Finally, I tried "reset network settings" as a last resort and immediately my phone works like a charm. It has happened another 3 times since - every time I have flown, with the exact same results.
All domestic flights. While I'm not a guru, I'm not a complete halfwit either - this is my 4th galaxy and it's definitely not something I'm doing or have ever had problems with before. I fly all the time and never a problem like this until this week. Checked APN, it's right. Checked software update - have most recent.
Any ideas? I'm desperate. Have searched literally everything I can think of and no one else seems to be reporting this problem, not to mention it's difficult to describe in a Google search. About at my wit's end having to re-enter wifi and passwords every day, relearn Bluetooth devices. Theres no other way to truly reset the mobile data settings and get my phone to work that I've discovered. Please, please help.
Eject SD card and remove sim, wait a min, reinsert cards. While the phone is on. Should reset just ur sim settings. Maybe
Hi all,
Hope someone can help me....Been googling and searching this forum - but nothing definitive found...
I had a HTC 10 which had been working perfectly fine for over a year, all usual stuff, email / web, satnav etc etc.
I recently sold the phone and did a factory reset before sending the phone to the new owner.
He has reported that everything is fine with the phone except the following:
1) When he starts a Satnav application (using GPS) the phone disconnects from the 3g/4g network - ie no data connection.
2) When he makes a voice call, a few moments into the voice call the data signal goes again - i.e. the signal level indicator has a line through it
I have no reason to doubt the buyer, as he is being very helpful - trying factory resets, re-installing apps etc and even uploaded a video showing the above happening. He has even agreed to try a wipe cache partition.
I did google and read about O2 network having some issue about no data during a phone call - but he is on the Three network. And I cant find anything on the GPS causing data connection drop.
He really wants to keep the phone, so if anyone can provide any suggestions or advise on how to resolve this - it would be appreciated..
UPDATE: Only seems to happen with Three SIM - has tried more than one including a brand new SIM supplied by the local Three Store.
Thanks!
UPDATE: Only seems to happen with Three SIM - has tried more than one including a brand new SIM supplied by the local Three Store.
Hi everyone, just a little curious on what side of the old "metaphorical" coin my phone has fallen on. The problem this coin is concerning, is simply one related to my SIM. My phone has no cell service right now since it doesn't want to acknowledge or use the sim card it has in it. It's a 512Gb unlocked phone I special ordered upon first release, no other problems (other than the screens scratching easily) but now it's no longer working on anything other than wifi. It's the wifi that I think caused this problem actually. I just set up a new lightweight Asus RT-AX56U router to utilize two WAN ports (one built in and the other setup through a USB ethernet adapter). The problem came about after I switched down to a WPA3/WPA2 setup from a full WPA3 simply due to a connection problem one of my laptops was having (it's wifi card was one from prior to WPA3). Shortly after I did that my Z Fold 3 started having frequent wifi drop problems. After about an hour of that the connection seemed stable, then the next thing I know the phone dropped connection to both Wifi and cell network! Then after I restarted the router, only wifi would reconnect and my cell network connection has been M.I.A. ever since despite what I do (tried airplane mode, tried cache whipping it, restarting it, and finally even a full factory wipe/restart). My phone is up to date on all of it's updates (finally decided to last month after seeing that my model has no root + camera options) but nothing other than a routen cache cleaning ever happened to it prior. Just trying to figure out what my next move now should be, get a new SIM card, or is a whole new phone needed?
I would first try another sim card to see it's related to the physical card or a carrier issue. Maybe try and borrow one from another network as well.
If that fails, try a factory reset.
If that fails, it's time to reach out to Samsung.
I tried a different SIM from a different phone from the same provider (on the same contract bill). But it wouldn't register, I even factory reset it prior to trying the other SIM. So I went and got a new one from the carrier, and problem solved! (First SIM card I've ever burned out without truly trying to)