Unlocked but can't see T-Mobile

[cyberace13]

Here's my problem, hopefully somebody can figure it out before I give up and sell this to somebody with AT&T.

I received a freshly refurbished AT&T 8525 (from ebay) and wanted to use it with a T-Mobile SIM. I upgraded to the latest AT&T distribution (WM6, downloaded from HTC), ran the HTC_Hermes_SIM_CID_Unlock_v3a successfully, put my SIM in and everything worked. After calling a friend and talking for about 5 minutes, the call mysteriously ended. I tried recalling (wouldn't connect) and then restarted the phone but it wasn't getting a signal.

Fearing the worst, I tried flashing the latest radio, rerunning the Unlock, and flashing various other ROMs (including an HTC, Schap's, and Pv Dvh Wm6.1 19209) but there was no change. The icon on the Today screen would either give an exclamation point or just continue scanning. If I went into the phone settings and tried to switch to manual network selection, I would sometimes get a choice of T-Mobile or Cingular but any connection attempt would result in a "Failed to register to network" message.

My SIM card works perfectly in both my old phone (HTC Tornado) and an older unlocked Nokia.

My last attempt was to put my friend's AT&T card into my A&T 8525 and it connected just fine with calling ability and everything! I've since run unlock many times, reflashed the radio, installed other ROMs and installed various version of Hard-SPL but none of them seem to be able to connect to the T-Mobile network using my SIM card (but have no problem connecting with my friend's). I can see the phone book on my SIM card so I know its not a bad SIM connection and it does not prompt me for a password (as it first did when I placed my SIM card in the phone when I first received it) so I'm pretty sure it is actually unlocked.

Any help whatsoever would be greatly appreciated!

[dieKatze88]

Try borrowing a friend's phone with AT&T, shove his sim into your phone and talking on it for a few minutes and see if it still happens there. If It doesnt then try your SIM again. Also, try reflashing your radio without your simcard inserted.

[cyberace13]

I tried reflashing the latest radio without a SIM, then inserted my SIM but there was no change. I'll try talking on it for a while with my friend's SIM and see if anything happens, but I'm doubtful. Thanks for the help. Any other suggestions?

I've noticed that when I go into Settings>Phone>Network and select Manual, all the cooked ROMs I've tried end in a "Cannot read settings from the network." while AT&T's gives a selection of T-Mobile or Cingular (neither of which actually let me register to a network, though).

[cyberace13]

I put my friend's AT&T card in and called my own cell phone. The connection died after 5 minutes, but then I called my own cell phone again and they stayed connected for 10 minutes before I ended it. I put my SIM back into the 8525 and still no signal.:confused:

While the AT&T SIM is inserted, the Settings->Phone->Network screen is different. It just says:
Current Network: AT&T
and has a button for Find Network which just pops up a window saying "Registering on the network...

Any other ideas?

[rafa1215]

Send it back to whoever sold this to you on ebay. Not worth all the hassle that you are going thru. I have the same phone and bought mine off ebay as well. It worked perfectly out of the box with no problems. I have t-mobile and when I placed the sim in - bam - the phone just worked. I had to configure the pop3 email and mms settings manually, but that was it. I have htc's wm6 on it.

[cyberace13]

Thanks for the advice, but the first one I got from this guy the screen died after a couple of days. He said it was under warranty so I sent it back to him to get it replaced and it took him 3 months to finally return it to me. I really don't want to deal with him again.

I was wondering if there was a difference between the SIM cards. Could you please run the "SIM Manager" Application on your phone. Then go to Menu>Tools>SIM Information and check out the numbers there. Mine says:

Total Phonebook Size:
250
No. of Phonebook Entries
20
Max. length for name:
16
Max. length for phone number:
50
SMS Message storage capacity:
30

Although my friend who has an AT&T 3G SIM has slightly higher numbers for max. length of name, phone number, and SMS storage capacity.

I've also heard some stuff about specifically asking to get your account 3G enabled, but I'm not sure if that has anything to do with this problem.

I figure I'll go down to a T-Mobile store and see if I can get somebody to let me try a newer SIM in the phone before giving up completely and selling it.

[rafa1215]

That's too bad. I bought my phone from zendoo and they have a pretty good rating off of ebay. I'd hate to find out that your ESN or whatever is corrupted. Here are my settings

Total Phonebook Size:
250
No. of Phonebook Entries
11
Max. length for name:
16
Max. length for phone number:
40
SMS Message storage capacity:
30

[cyberace13]

Oh well, I guess I'll see what I can sell this for, wait until my contract is up at the end of summer, and then see what new phones are out then. Thanks for your guys help.