[Q] Modem panic when using 3G + outgoing call

[_unknown]

I received my Atrix 2 days ago, and I like it a lot, but I have one major issue. I live in Belgium (Mobistar), and imported the phone from the US (AT&T). It was sim-unlocked using a code I bought online. Incoming calls, data (3G, H+), wireless work fine, but when I try to make an outgoing call, the phone just reboots

This is with a fully stock (1.2.6), non-rooted Atrix, default set to use GSM/CDMA auto (PRL). I've found out that I can use the *#*#4636#*#* menu to force the data-connection to use EDGE (GSM only). When I do this, everything works fine, including outgoing calls, I just don't have 3G

I've checked with logcat what happens when I try an outgoing call + 3G, and I see these errors:

04-09 15:52:20.301  1374  1416 E RDS     : RdsReadSvrMsg: READ HEADER FAIL 0
04-09 15:52:20.301  1374  1416 E mdm_panicd: connection broken - recreate socket
04-09 15:52:20.301  1374  1416 I mdm_panicd: Subscribed to RDS_MSG_ID_UNSOL_IPC_FAILURE
04-09 15:52:20.301  1374  1416 I mdm_panicd: RDS Socket resd something on gUnsolicitedFd = 4 
04-09 15:52:20.301  1374  1416 E mdm_panicd: Unsolicited message too short: expected at least 32 bytes, got 0
04-09 15:52:20.301  1374  1416 D mdm_panicd: Unsolicited thread finished
04-09 15:52:20.301  1374  1374 E mdm_panicd: Modem panic detected, reboot system!
04-09 15:52:24.490  4940  4940 D dalvikvm: GC_EXPLICIT freed 8086 objects / 400384 bytes in 76ms

I've tried reflashing 1.2.6 from the leaked SBF (after doing a restore to factory settings), but this did not result in any different behaviour. I then tried to upgrade to 1.5.7 using the official Moto upgrade procedure, but again, same issue on the outgoing calls.

Does anyone have any suggestions on how I could debug/fix this? One test I intend to do is using a different operator's SIM, to determine if its related to Mobistar's UMTS implementation, or if its a generic problem with my phone. I was also suggested to do a "fastboot erase kpanic", but as I'm unsure what the kpanic partition is for, and whether or not it's safe to erase it, I have not tried it.

I can use the phone on EDGE for now, but I hope this issue can be solved, so I can enjoy my Atrix to the full extent!

Thanks in advance for any help,

unknown

 

[_unknown]

Just tried using a different operator's sim (Mobile Vikings):

the phone does not reboot/crash on outgoing calls, and they work correctly. I did notice that it cuts the 3G connection during the call, and restores it after call completes. That shouldn't be necessary I think, but it's still far more desirable behavior than what I'm seeing with Mobistar!

My company pays for & decides the operator though, so this is not something I can easily switch..

unknown

 

[_unknown]

tried playing a bit with the ril.modem.mode and the the ril.hsxpa settings, but did not find anything useful.

Also made a motorola support ticket, got the expected bs response:

"I do apologize but the Motorola ATRIX from AT&T is not completely compatible with the data connection of other Service Providers. The ATRIX is configured to work with AT&T's data network only. That is why it is not available for sale outside the United States. I'm so sorry for that inconvenience."

I guess I'm stuck on 2G until more people start to have this problem, or until a new radio firmware is released

 

[_unknown]

FIXED!

Hooray! Fixed flashing the radio from the Telstra SBF, see this thread for more information:

http://forum.xda-developers.com/showthread.php?t=1052914

 

[nazrin313]

Will give it a shot

UPDATE: This worked!!!!! UTMS and voice calls..NO MORE REBOOTS...HORAAAAAAAAAAAAAAA