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[SOLVED - bad SIM card] Viperone 4.x, desperate to get 4G LTE to stick

46 posts
Thanks Meter: 6
By ProcyonSJJ, Member on 11th February 2014, 04:10 AM
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12th February 2014, 12:11 PM |#11  
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It could be the SIM card or just your area having 4g issues. I have been on the Rom for awhile and never had an issue with 4g dropping. I do drop to 3g when at work but that's more due to coverage. Hope it's just your SIM card but it's definitely not the Rom.

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12th February 2014, 09:02 PM |#12  
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Thanks Meter: 68
Originally Posted by ProcyonSJJ

OK, here's where I'm at.
1) I successfully installed both the 3.11.605.1 ROM and recovery. Booted up the OS, requested a factory restore, the phone rebooted and did that green icon screen indicating that the recovery was doing its thing. (BTW Santos, could never get power + volume up to do anything, not that I tried too hard once I got the factory restore to work through the OS.)
2) Based on Santos's confidence, I didn't bother flashing ViperOne 4.1.0, and went straight to clean flashing 4.2.1. I let it boot up, did the setup, went back to recovery and dirty flashed 4.3.0.
The results: 4G LTE still drops. It seems to hang on better, but it definitely drops back to 3G regardless of what settings I choose. Interestingly, when I changed the preferred network from Global to CDMA/LTE, sometimes it would tell me that there's no network, would I like to switch to Global. When I went back to the preferred network setting, somehow thge setting was changed to GSM. I also noticed something similar if I went into the Misc Phone info setting under Venom Tweaks and tried to force CDMA/LTE only without EvDo.

SO... Now I'm back to square one, determined to figure out the root cause. I'm back to 3.11.605.1, and I'm going to stick with it for around 24 hours to see if it drops to 3G before I proceed to follow AznInertia's instructions and clean flash 4.1.0. At least then I'll know if it drops, it's not the ROM, but its been about an hour and no drop so far. *sigh* Thanks again for your patience and assistance.

Update: An hour and a half later, still connected to 4G. Although, I've been at my home the entire night. The true test will be when I drive to and from work tomorrow.

Update 2: I don't know when it happened exactly, but I dropped to 3G on stock! I'm actually excited because maybe it's just my sim card after all! Hopefully I can just replace it, reinstall ViperOne and put this whole issue to bed!

I'm glad you were able to get 3.11.605.1 going and got it restored, I went through the same frustration with you and I tried multiple combinations for the 4G drop but the one I suggested was the only way to do it (clean of 4.2.1 and 4.3 full ROM had dropped connections).

If you get dropped connections to 3G its probably: coverage drops or perhaps you need to change SIM card. If you go to the corporate stores (not 3rd party), you can swam SIM for free. If you go to those 3rd party Verizon dealers they charge for SIMs. FYI
14th February 2014, 04:06 PM |#13  
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Thanks Meter: 6
So it was the SIM card afterall... *facepalm*

Couldn't find a corporate VZW store, so I had to go to a retailer, and like you said, they charged me. $10, so it wasn't too bad.

But I switched on Wednesday, and I have dropped down to 3G exactly one time, when I was in a particularly bad area. Flashed 4.2.1 clean and 4.3.0 dirty, and have been running fine ever since. Don't know why I waited so long to address the SIM card. I really wish there was some kind of useful diagnostic tool that could identify SIM cards that have gone bad.

Although this thread is Note centric, the second post describes the problem I was having perfectly (understanding after the fact...):

Thanks again for everyone's help. I'm going to modify the original post.
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