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[Q] AT&T Atrix 2 frequent radio crash

Hi guys
I've tried researching this issue from time to time but have never been able to find any definitive information. A couple of threads around the traps detailing similar problems, but that's it. Anyway, what happens is this: the phone will be showing a couple of bars or whatever, but there actually isn't any signal at all. Calls can be initiated, but wont actually connect, and then can't be ended either. The only way to resolve the issue is to reboot the phone, or activate airplane mode and then deactivate it again (which tends to take considerably longer than a simple reboot). I'm calling it a radio crash because that's what it seems to be, but I could of course be wrong about what is actually going on under the hood.
This post is basically part of an effort to diagnose the problem before I decide what this phone's future will be (have a new, different model on the way now).
Thanks for reading, and any advice/information will be much appreciated

It sounds as if you have a defective phone, or it could be you carrier.
Have you tried a different phone.
Do other people have the same problem with that carrier
You could also think of it like this, carrier problem, you can connect to wifi if it doesnt have internet connection, it still can show full bars but nothing will load
Sent from my MB865 using xda app-developers app

I have an SGS3 now, with the same SIM in it (cut down to micro of course). Average signal strength (as reported by third party apps that don't pad) is about the same, but no dropouts at all (as monitored and reported by the No Signal Alert app). However the SGS3 supports both my carrier frequencies, and the Atrix 2 doesn't. Having said that, the SGS3 seems to stay on 2100MHz all the time anyway where I am.
I've also put a different SIM in my Atrix 2, from a network that is more compatible (850/2100), and although the dropouts are less frequent, they are still occurring. However, I haven't had a "radio driver crash" in over a week. The dropouts have only been momentary too, lasting no more than a few seconds, 1-3 times per day (mostly in the afternoon).
I'm also planning to charge the phone up and leave it at a couple of other locations for a day or two while continuing to monitor signal interruptions. Should be interesting.
Thanks for the reply

Just a quick update: left the phone at another location for a few days where the average signal strength is stronger, and not a single dropout was logged during that time. In certain areas this phone is obviously not as good as some others at maintaining a signal, but I don't think the dropouts themselves are indicative of a fault given this new information.
The previous instances of radio lockups/crashes are still haunting me a little, but this strange phenomenon is still yet to occur again. I also forgot to mention that I'd previously done a full restoration of the official 4.0.4 ICS release in order to return to the phone completely to stock, which might have something to do with that. Previously it was rooted, with only some minor modifications, but I guess it's not beyond the realm of possibility.

Wait i have an idea
Send me your apn data.
Motorola doesnt have the best antennas either.
Also does it crash at a certain time after it is turned on or is it random?
Sent from my SOUL

Signal Dropouts

hey!
I have a problem with my One Mini. I have constant signal dropouts. Phone calls stop after a second, also losing data-connection all the time and always seeing the message "Preparing SIM-card".
It feels like my phone having problems with some mobile-cells. Usually I have to try to call someone 3-4 times, and after 3-4 attempts I can talk normally without getting interrupted after 1-2sec - like my phone found the correct cell or something like this.
I tried
- my second (O2) sim-card
- put some tape on top of the sim-card (solved this problem for people with different phones)
- put some signal-tweaks in my build.prop
- changed network mode (WCDMA/GSM/LTE...)
but nothing helped.
I am on O2-Germany for many years and never had those problems, my One S was working fine (before it got bricked )
Had the same problem last month in France...
anyone else having this problem? could this be kernel-related? I'm using JMZ`s kernel. But I guess this is more a radio-problem, or?

theodorius123 said:
hey!
I have a problem with my One Mini. I have constant signal dropouts. Phone calls stop after a second, also losing data-connection all the time and always seeing the message "Preparing SIM-card".
It feels like my phone having problems with some mobile-cells. Usually I have to try to call someone 3-4 times, and after 3-4 attempts I can talk normally without getting interrupted after 1-2sec - like my phone found the correct cell or something like this.
I tried
- my second (O2) sim-card
- put some tape on top of the sim-card (solved this problem for people with different phones)
- put some signal-tweaks in my build.prop
- changed network mode (WCDMA/GSM/LTE...)
but nothing helped.
I am on O2-Germany for many years and never had those problems, my One S was working fine (before it got bricked )
Had the same problem last month in France...
anyone else having this problem? could this be kernel-related? I'm using JMZ`s kernel. But I guess this is more a radio-problem, or?
Click to expand...
Click to collapse
I haven't had this issues, in fact, I went camping last weekend and most of the time I was able to get 1 bar when everyone else didn't have service at all. I'm using the AT&T variant on AT&T with the WWE DeOdexed Stock ROM and Jmz's Kernel 09-04-13. I attached a picture of my kernel, baseband, build, ect. I'd suggest making a backup and restoring your phone to stock to see if it's a software issue.

Cannot make or receive calls(Emergency calls only)

Hi,
From past three days, signal is not showing up on the phone. And it only shows a red triangle with a white plus sign on it.(Emergency Calls Only)
I didnt do any changes to the phone, it just randomly started three days ago.
I am on Indian version of unlocked Motorola atrix 2 MB865.
I am on jellybean 4.1.2 for past many months. So I dont suspect the ROM.
I have tried using some other sims also.(It is NOT the problem of the Sim)
I usually get full signal at my place.
I have searched internet thoroughly and read almost all the threads related to this topic, but it didnt help me much.
Things I have tried till now.-->
- Swapped sims with many other phones.
- Installed the "Network" app and many other similar apps which was suggested in some other threads.
- Switched Flight mode on and off.
- Factory reset the phone.
- Kept it off for hours and then checked again.
- Prayed that it will get fixed soon
Q) Did you try turning it off and on again?
Ans) Yes..yes.. Many many times. Sometimes, after reboot it shows signal for 2-5 minutes, but I CANT make/receive any calls/sms(The call just drops two seconds after dialling)
PS:- I think that when I received the last call, I was listening music on my headset and I had received the call with the headset.
Thank You very much.

K****ijs said:
Hi,
From past three days, signal is not showing up on the phone. And it only shows a red triangle with a white plus sign on it.(Emergency Calls Only)
I didnt do any changes to the phone, it just randomly started three days ago.
I am on Indian version of unlocked Motorola atrix 2 MB865.
I am on jellybean 4.1.2 for past many months. So I dont suspect the ROM.
I have tried using some other sims also.(It is NOT the problem of the Sim)
I usually get full signal at my place.
I have searched internet thoroughly and read almost all the threads related to this topic, but it didnt help me much.
Things I have tried till now.-->
- Swapped sims with many other phones.
- Installed the "Network" app and many other similar apps which was suggested in some other threads.
- Switched Flight mode on and off.
- Factory reset the phone.
- Kept it off for hours and then checked again.
- Prayed that it will get fixed soon
Q) Did you try turning it off and on again?
Ans) Yes..yes.. Many many times. Sometimes, after reboot it shows signal for 2-5 minutes, but I CANT make/receive any calls/sms(The call just drops two seconds after dialling)
PS:- I think that when I received the last call, I was listening music on my headset and I had received the call with the headset.
Thank You very much.
Click to expand...
Click to collapse
Is the Baseband version shown, or is it blank?

XploitMachine said:
Is the Baseband version shown, or is it blank?
Click to expand...
Click to collapse
Baseband version is showing as 2012-0712 09:44 Off Blf LUD_EDISON_R1E_PATCH_36_120712_0920 ch1090280_M570_PC_CARD_RAINB

I have now found that it is due to very very poor reception.... For some reason, this phone's signal reception has drastically reduced.
I can get signal only if I go out, still the signal strength is shown at maximum -75dB and frequently dropping to -100dB. I was able to make one call and it dropped as soon as i entered inside the house.
(The same sim on other phones have full range even inside house)
What is the suggested solution?
Thanks

K****ijs said:
I have now found that it is due to very very poor reception.... For some reason, this phone's signal reception has drastically reduced.
I can get signal only if I go out, still the signal strength is shown at maximum -75dB and frequently dropping to -100dB. I was able to make one call and it dropped as soon as i entered inside the house.
(The same sim on other phones have full range even inside house)
What is the suggested solution?
Thanks
Click to expand...
Click to collapse
Seems to be a hardware issue then. Is your phone within warranty, by chance?

Nop it is not in warranty.

yx868868 said:
I would love to help you, but I can not afford to，Experts hope to help
Click to expand...
Click to collapse
If you can't afford to help, then what's the point of this post?
Increasing post count I guess.

Might be a loose connection after a drop ?
Your best bet would be to dissamble the phone and assemble again. In the meantime check the connectors and others if they're in their place. There're good disassembly videos for atrix 2 in youtube.

K****ijs said:
Hi,
From past three days, signal is not showing up on the phone. And it only shows a red triangle with a white plus sign on it.(Emergency Calls Only)
I didnt do any changes to the phone, it just randomly started three days ago.
I am on Indian version of unlocked Motorola atrix 2 MB865.
I am on jellybean 4.1.2 for past many months. So I dont suspect the ROM.
I have tried using some other sims also.(It is NOT the problem of the Sim)
I usually get full signal at my place.
I have searched internet thoroughly and read almost all the threads related to this topic, but it didnt help me much.
Things I have tried till now.-->
- Swapped sims with many other phones.
- Installed the "Network" app and many other similar apps which was suggested in some other threads.
- Switched Flight mode on and off.
- Factory reset the phone.
- Kept it off for hours and then checked again.
- Prayed that it will get fixed soon
Q) Did you try turning it off and on again?
Ans) Yes..yes.. Many many times. Sometimes, after reboot it shows signal for 2-5 minutes, but I CANT make/receive any calls/sms(The call just drops two seconds after dialling)
PS:- I think that when I received the last call, I was listening music on my headset and I had received the call with the headset.
Thank You very much.
Click to expand...
Click to collapse
K s h i t i j s, who is your network provider? EDIT: Just saw that you're on MTNL.
I have been having a similar problem for a similar length of time with my Atrix 2 and I'm on stock ICS. I got my sim replaced by Vodafone but the problem persisted so I asked the guy who originally sold it to me to get it checked out (warranty is long gone).
He mentioned that another customer of his with the same phone also developed the same problem around November or December 2013. Both that guy and I are on Vodafone, Mumbai.
In testing, his phone worked perfectly with an Airtel sim and mine worked perfectly with a borrowed IDEA sim. Both our sims work perfectly in other phones. Both were then sent to the official service centre but they essentially threw their hands up.
The coincidental timing of the problem for two (maybe three) phones of the same model leads one to think there must something with the network broadcasting? Could someone with better knowledge of the subject (mine is approximately nil) comment?

[Q] Network Signal In and Out with Reboots

I searched and did not see anyone else experiencing this issue. I have a Black 32 GB stock rooted. It worked fantastic for about 2 weeks and then all of a sudden I noticed the following:
Day 1: No SMS received. I was on WIFI and had network signal in the notification bar but did not receive SMS that were sent to me.
Day 2: No Cellular Signal. I looked at the APN and it had disappeared. I attempted to add it again and reboot the phone and it wouldn't add. The phone began rebooting on its own and continuing with a bootloop after running for about 10 seconds it would reboot again. It did this throughout the day. I called Google and they had me do some soft and hard resets. After the soft reset the phone would connect right after startup then disconnect after 2 seconds and reboot itself. I hard reset the phone and relocked the bootloader and reinstalled factory recovery and it is still doing it.
Google has given me authorization for an exchange but I was just wondering if anyone had any ideas because I'd rather not be without a phone for 2 weeks.
BTW I am on Straight Talk

I had a similar issue
I had a similar issue. After a month of functioning normally, my Nexus(rooted using CFroot, stock ROM, T-Mobile) lost the ability to get reception. First, it showed network signal, but cell access was not functional. A few hours later, bars dropped to zero, and it seemed like I could only get reception in the strongest signal areas. I would get signal sporadically when driving, but never when I was stationary. The phone never had problems with rebooting though.
After spending a day trying to fix it, factory reset, relock, flashing a factory image, I called Google, and they warranteed the phone.
nebrando said:
I searched and did not see anyone else experiencing this issue. I have a Black 32 GB stock rooted. It worked fantastic for about 2 weeks and then all of a sudden I noticed the following:
Day 1: No SMS received. I was on WIFI and had network signal in the notification bar but did not receive SMS that were sent to me.
Day 2: No Cellular Signal. I looked at the APN and it had disappeared. I attempted to add it again and reboot the phone and it wouldn't add. The phone began rebooting on its own and continuing with a bootloop after running for about 10 seconds it would reboot again. It did this throughout the day. I called Google and they had me do some soft and hard resets. After the soft reset the phone would connect right after startup then disconnect after 2 seconds and reboot itself. I hard reset the phone and relocked the bootloader and reinstalled factory recovery and it is still doing it.
Google has given me authorization for an exchange but I was just wondering if anyone had any ideas because I'd rather not be without a phone for 2 weeks.
BTW I am on Straight Talk
Click to expand...
Click to collapse

flmz said:
I had a similar issue. After a month of functioning normally, my Nexus(rooted using CFroot, stock ROM, T-Mobile) lost the ability to get reception. First, it showed network signal, but cell access was not functional. A few hours later, bars dropped to zero, and it seemed like I could only get reception in the strongest signal areas. I would get signal sporadically when driving, but never when I was stationary. The phone never had problems with rebooting though.
After spending a day trying to fix it, factory reset, relock, flashing a factory image, I called Google, and they warranteed the phone.
Click to expand...
Click to collapse
It just seems so much like a software issue as opposed to hardware that it surprises me they are willing to warranty it... but I guess I'm not the expert.
How long did it take you to get your replacement phone?

nebrando said:
It just seems so much like a software issue as opposed to hardware that it surprises me they are willing to warranty it... but I guess I'm not the expert.
How long did it take you to get your replacement phone?
Click to expand...
Click to collapse
I got a replacement phone pretty quickly. The phone shipped the day after I ordered the replacement, but YMMV.
Why do you think it was a software issue? The problem persisted after I switch back to a factory image. The replacement phone, running the same software does not have the same issue.

flmz said:
I got a replacement phone pretty quickly. The phone shipped the day after I ordered the replacement, but YMMV.
Why do you think it was a software issue? The problem persisted after I switch back to a factory image. The replacement phone, running the same software does not have the same issue.
Click to expand...
Click to collapse
That makes sense that it was a hardware issue. I guess it could be a faulty radio or something. I'm glad to hear you got your device shipped so soon. Did you end up having to pay shipping?

I ran a nexus 5 for about 4 days and went through two of them both having issues holding a signal. Both phones would start with LTE and then drop to 2g go to 3g and then 4g back to no bars and then 2g and 3g. I was stock all the way and I wish the nexus 5 worked better. It could be a software issue as when I took the OTA to 4.4.2 it became worse. All the areas I was in while this happened were areas that were supposed to be strong for 4g and LTE.
That said I I need a phone that is a bit more reliable even though I'm on T-Mobile. I switched to the LG G2. It has a better antennae and doesn't keep bouncing between modes when in various areas.

Wildly intermittent data connection

Starting about two weeks ago my phone started dropping 4G signal down to 3g with no apparent reason. This is in the same locations that I've been in multiple times in the past and had excellent connectivity. To make it more interesting, my wife has the exact same phone purchased on the exact same date. standing next to her she will be on 4g and I will be on 3G. This is on the Verizon service. So far I have been to Verizon and replace the SIM card. Reset data connection. And done a factory reset. If I cycle the airplane mode four five times in a row many times but not always it will restore 4G service. Any guesses at all?

Open 'About Phone' under settings on both phones and compare various versions. One may have received a new update before the other.
Ever since the March retail update my signal indicator seems to constantly bounce from Edge to H, H+ and LTE(xt1955-5 on TMO). When I am in an area with good reception(I live deep in the sticks), the download rate(1-4 MB/s) does not waiver despite the signal indicator changing every 10 seconds. When reception is known to be sketchy, and it indicates I have LTE, I am still lucky to get 100 KB/s max down.

Is your phone rooted? If so, what ROM are you using?
Some ROMs (and perhaps stock firmware) have an option to choose the preferred network type for your phone to connect to. Perhaps the setting was changed to 3G on your phone.

Replaced
Never did get to find out what the problem was. I was able to get a warranty replacement. Thanks for all the suggestions. I did look into most of them. I think it helped me get the warranty service expedited by saying that I tried all these various things. My wife's phone in mine are on different software versions. However my replacement phone, which I'm presently using, had the same software version that I had problems with before and it's working flawlessly. So it ended well but I still have no idea what happened. Thanks again for all the help and suggestions.