4 replies to this topic

[ebradsha]

Hi all,

 

I have the following phone:

 

Model: Droid Razr Maxx HD (XT926)

Android version: 4.4.2

System version: 182.46.15.XT926.Verizon.en.US

Build number: KDA20.62-15

 

The bootloader is locked and the device is not rooted.

 

I followed these instructions to unlock the device for US carriers using CDMA Workshop:

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It worked brilliantly -- I was able to insert my T-Mobile SIM and pick up a strong HSDPA signal.

 

However, I've encountered two problems since then that I believe are related to one another:

 

1. Every time I turn on the phone or insert the SIM, I receive the message "This SIM card is from an unknown source". I can dismiss the message by clicking 'OK'. Seems harmless...

 

2. However, if I leave the T-Mobile SIM card in the phone for ~1-2 hours, the phone will abruptly stop recognizing the T-Mobile SIM. Even if I re-insert my original Verizon SIM, the SIM will not be recognized. Only a phone reboot solves the issue, but again after 1-2 hours the SIM is abruptly not recognized. It seems that there is a background process that is disabling the SIM. The SIM does *not* get disabled if I re-insert the Verizon SIM, reboot and wait 1-2 hours -- it is only triggered by the presence of the T-Mobile SIM.

 

I have a theory on the cause of this. After some research I've learned that #1 can be resolved by disabling/removing VzwPhoneService.apk. That APK creates the process com.motorola.setupwizard.phoneservice. Unfortunately my bootloader is locked and I'm unable to root my phone using towelroot due to the recent OTA upgrade I took (system version 182.46.15.XT926.Verizon.en.US). 

 

Does anyone have any theories on what might be causing my T-Mobile SIM to be disabled after 1-2 hours?

 

Does anyone know a way that I can disable/remove VzwPhoneService.apk or "com.motorola.setupwizard.phoneservice" without root? Maybe there's a way I can get root temporarily?

[ebradsha]

After further researching, I'm almost certain this issue has to do with Fast Dormancy. The issue is discussed at length on the Motorola forums and my symptoms match up exactly:

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Further explanation/discussion:

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A captured bug report on my phone also indicates fast dormancy activity at about the same time I lose the SIM card.

 

 Unfortunately with the latest OTA update, I'm unable to root my phone and edit build.prop to disable Fast Dormancy on my phone. Still searching for a solution. Will update this thread if I find one.

 

Any tips on disabling Fast Dormancy on a non-rooted XT926 would be much appreciated.

[hleo114312]

I have the same problem here in mexico, i was using iusacell and didnt had trouble but when i inserted my telcel sim i lost network. Now it says that theres no sim inserted even if i reboot my maxx. Im unlocked and rooted. Tell please what else can i do. I try to enter the hidden menu and cang have acces *#*#4636#*#* and nothing.

Enviado desde mi XT890 mediante Tapatalk

[ibolski]

 

 

Does anyone know a way that I can disable/remove VzwPhoneService.apk or "com.motorola.setupwizard.phoneservice" without root? Maybe there's a way I can get root temporarily?

 

 

Without root, you're stuck. There is no way to get root, permanently or temporarily, due to your phone being on the latest and last OTA for this model. Without root access, you cannot modify anything in the system partition, period. 

 

There is no way to flash back to a previous version since your bootloader is locked, so I hate to say it, but as we've told countless others before in your situation, there is no way to root nor unlock the bootloader. Sorry.

[chuckh1958]

Towelroot still works for xt926.