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[Q] Problems using T-Mobile RUU (Error 155)?

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(Last edited by Shott3r; 3rd December 2013 at 06:09 AM.)
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Question [Q] Problems using T-Mobile RUU (Error 155)?

My setup:

Tmobile HTC One Model PNO713000 (sim unlocked)
Hboot 1.56
Firmware 4.06.1540.2 (latest Kit Kat)
Super CID

Running Insert Coin 7 after a clean wipe. But on every single ROM, I have not been able to send MMS messages. Receive MMS just fine, send/receive SMS just fine. Checked the APNs, they are fine. (It's not the phone, I swap in my ATT sim card and send MMS just fine on any ROM). I unlocked everything and flashed immediately as I got the phone, so I have no idea if I ever tried to send a MMS while stock.

I want to use the TMobile 4.3 RUU from HTC's website. But it keeps giving me Error 155. Is it the SuperCID? Is it the hboot? Must I go back to S-ON? Downgrade the firmware? I want to go back to STOCK Tmobile (retaining S-OFF if possible). Just tried it after doing a fastboot relock and still Error 155.

Please advise.
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Error 155 is because of hboot, downgrade to 1.44 first, then ruu will work fine

Sent from my HTC One using Tapatalk
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You have to find the firmware.zip from the last T-Mobile OTA. Then you have to reboot in RUU mode via fastboot in order to flash it. Then you can run the T-Mobile RUU.

Sent from my HTC One using xda app-developers app
htc one, ruu, s-off, stock, tmobile
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