Troubleshooting Loss of data/wifi with sim swapping.

[dino325]

Hey guys,
So I’m having a bit of a dilemma. Here's my situation, my Xoom had been updated to 4G already. My issue is that I can't diagnose when exactly a loss of data connectivity occurs when swapping sims with my Thunderbolt.

Here is what I’ve found so far.

-Upon receipt of Xoom back from Moto I,
1. Flashed recovery-Tiamat-R4c-100611-1150-cwm.img
2. Flashed Universal root method.
No problems with Wifi or Data until I attempted to swap Sim card with my Thunderbolt. Then complete loss of data and WiFi. I tried restarting and removing sim, Power cycling with Vol-up/Pwer with no results.

-From here I hard reset back to stock.
I then Reflashed recovery-Tiamat-R4c-100611-1150-cwm.img.
Root was still intact so I flashed Android Honeycomb 3.2.2 - Stock & Rooted, which put me at HLK42B. I had 3g/4g however no WiFi. At this point I tried sim swapping without powering down and after a force restart was successful in using the TB sim card. My Verizon updated to my unlimited plan and all on the Xoom home screen.

I however decided to try and fix WiFi so I without wiping flashed HLK42C provided by SemperAndroid. This restored all WiFi connectivity and 3g/4g remained intact. I also flashed the "Tachi" kernel and OC'd to 1.4. I experienced no outages of data all last night and today.

However this afternoon I attempted to swap my sim card and after a forced restart was met with no data connectivity but working WiFi. I power cycled several times with no result. I then powered down and pulled the sim, put in the Xoom sim and restarted with no results. However after approx 3-4 times of powering down and pulling the sim I received about 20 seconds of 1x connectivity and then a short while later I noticed I had 3g showing but when I went to connect to browser it disconnected and I received a page couldn’t be loaded.

I also tried to restore a backup I had to HLK42B but it did not restore any data.

So it appears that so far we can only swap sims successfully on HLK42B however we lose WiFi connectivity as a result. Anyone have any other findings to share?

Thanks for your time..

Dave

 

[dino325]

Update:

Alright some more trial and error. I'm can't completely confirm it yet but so far it really seems that the manner in which you swap the sim card is what might cause the loss of data.

Last night I reverted to a backup of HLK42B which didn't initially store data but after troubleshooting a few times I learned that putting the settings into CDMA only and restarting seemed to reattempt the activation to the network.

Anyways, after getting back data, I decided to swap in my TB sim again. This time I pulled the tray out waited about 15 seconds for the "Please insert sim card" popup and plugged my TB sim back in then restarted via the popup.

Viola, 4g connectivity, I had lost root due to restoring my backup of HLK42B so I flashed recovery and universal root and data checked ok. I then flashed HLK42C over HLK42B and still retained data while on the TB sim. Backed up and flashed Tachi kernel and still maintained data. I then pulled the sim tray in the same manner allowing 15 seconds or so and reinserted the Xoom sim and restarted via the popup. Again no issues with data connectivity.

My only issue I can see was the manner in which I pulled the sim card out initially yesterday. In an attempt to trick the system I pulled the Xoom sim and immediately popped in the TB sim without allowing the device to popup with the notification of "No sim card inserted" After that I experienced the loss of data..

Again these aren't backed up with any technically "real" proof, just trial and error.. If anyone has anything else to share please let me know..

Dave

 

[kurttrail]

You just picked the wrong time to swap cards. VZW was having connectivity problems yesterday.

Sent from my Xoom using Tapatalk