[Q] HTC One (T-Mobile) "Service State: Radio Off"

Hi - I'm a semi-noob with this phone and Android in general (long-time iPhone JB'er finally saw the light), so sorry for any ignorance/stupidity in what follows...


HTC One, on T-Mobile
Android 4.3 SW# 3.24.531.3
Baseband vsn: 4A.21.3263.03_10.38m.1157.04L
Rooted, Unlocked, S-OFF

I was traveling on St Martin (French Caribbean) where T-Mobile gives free data roaming, so I turned on roaming and everything was fine - cell service, cell data, wifi all clearly working properly. After several days, I noticed no cell service or 3G indicator, but my wife's T-Mobile iPhone had full bars and 3G service. I waited a while, and (I *believe*) data & cell service came back on once for a while, but then failed again and have not returned to health since then (it's been about a week). Wifi works fine. When I tried to find a signal I would get "Error Searching for Networks". I thought maybe it had to do with roaming, but when I returned home (USA) I still had no cell signal/data.

I've tried rebooting, turning Data roaming on and off, Airplane mode on and off, all choices of Network mode, power off for a long time while charging, a couple other more obscure suggestions that I can't remember. I have not tried reverting to Stock or flashing a radio.

In poking around in settings:
IMEI: [normal] (this is different from several other people reporting similar problems)
Network Mode: GSM / WCDMA / LTE Auto

Operator: Unknown
Signal Strength: 0
Mobile network type: Unknown
Service State: Radio Off
Roaming: Not roaming


I've seen several posts here and on Android Forums with similar problems, but never quite a match - always a different phone and/or they are now missing their IMEI, which is not true for me and seems significant.

I never dropped the phone in water or anything, but I was traveling and it's possible it got more humidity than normal (one thread suggested water damage as a likely culprit).

Is there anything for me to do before (A) flashing a radio, (B) returning it to stock, (C) taking it to T-Mobile and hoping they'll fix it (still under warranty)? I haven't flashed a radio before, but it sounds like it's straightforward - if you have any suggestions, let me know.

I have an OTA update available to 4.4.2 - is it likely that would help me? And if I do that how much damage control will I have to do to get back to rooted/unlocked/S-OFF status?

Someone with a different phone said they removed their battery for a couple of hours and all was fine, but I'm scared to try to remove my battery, especially if I might have to take it for warranty repair.


Thanks for any guidance you can provide, and let me know if I should post any more info...
-lhuge

[SOLVED]

alray said:

Have you tried to switch on radio manually? Dial *#*#4636#*#* ---> phone info ---> there is a switch to turn on/off radio

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Oh my freaking gawd, thank you. It actually didn't work at first - the button just read "turn off radio" (as if it was currently on), and tapping it didn't seem to cause any change. Kind of on a whim, I changed "preferred network type" from "WCDMA preferred" to "LTE Only", went out to settings to see if anything had changed, turned off WiFi, came back to the phone info page, clicked "turn radio off" again, and then I noticed that numbers on the screen were moving, and I had 4G/LTE and full bars again. I've switched back to "WCDMA preferred" and everything seems fine, but I don't know whether that's the right choice out of a long list of options - it's just what was there to start with.

I feel silly that it was so simple, but I didn't know about that testing screen. Thanks a ton.

alray said:

Do not attempt to remove the battery yourself on the M7, bad idea if you are planning to send the phone under warranty.

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Roger that, fears confirmed. Thanks again