Hi Guys.
Short info: - before: HTC One M8 Verizon, Android 4.4.4 (RUU M8_VZW 4.4.4), rooted, S-OFF, Super CID, TWRP 2.8.3.0
- after: HTC One M8 Verizon, Android 4.4.4 (Viper OneM8 3.2.1), rooted, S-OFF, Super CID, TWRP 2.8.3.0.
Few hours ago I finished "converting" HTC One M8 Verizon from 4.4.4 to T-Mobile version, successfully installing Viper OneM8 3.2.1 over 4.4.4 RUU firmware, as described in this post:
http://forum.xda-developers.com/show....php?t=2710720The main reason for the above was lack of LTE services under Verizon firmware (I live in Europe).
Finished installing Viper ROM, configuring phone, restored content (apps, contacts, settings etc) - part of it manually. LTE still not available, and continued to verify.
In the end I started to check Viper Tweaks section, and finally got to Misc - Phone info. While there, I checked also Radio bands, and I was stuck in the radio menu, with only 3 options (US Radios, 900-, 1900-). Had to select one to continue, and ... the winner was 900-. Instantly lost GSM signal and never came back.
Just to be nicer, after reboot (normal reboot), 900- option disappeared from Radio bands in Phone info advanced menu, and never came back. No matter what I did.
What I did try (all with full wipe / formatting etc):
- resetting Viper ROM
- reinstalled Viper ROM
- reverting to RUU M8_VZW 4.4.4 nandroid backup (saved before first installing Viper ROM).
- reverting to clean RUU M8_VZW 4.4.4 firmware
- flashed 4.4.4 radio from this topic: forum.xda-developers.com/verizon-htc-one-m8/development/radios-0-89-20-0222-t2824882
- reverting to Viper One ROM, this time installed with T-Mobile version. Same outcome, different message: "error er05 invalid sim".
Error messages stepped on:
Constant: "The SIM card is from an unknown source"
From time to time: "your SIM card does not allow a connection to this network."
If I tried to select GSM network and search for operators (manually / automatic): "No network found. Select "Yes" to switch to global mode, or Select "No" to stay in current mode." And "Error searching for networks" / "No networks found".
The only thing that did not have possibility to check (yet): SIM card health.
UPDATE: SIM card checked and OK, phone registered finally (T Mobile version of Viper One had also "Auto" option under Radio band, in Phone info hidden menu! :eek:).
Still working on this, managed to solve it while compiling this post, but still have the question: what have I done so wrong, and how can I get back to the "good" setting? Is the radio band setting so resilient to full format, several ROM's and resets, even radio firmware change?!
I will revert with updates!
Thanks!