network registration from NEO! please help!

[joerg]

Is this a simcard-issue or a basestation related problem?
Will "bad" cards show same behaviour when roaming to a different provider's 
network; will "good" cards start to oscillate when roaming to this exact cell 
where the T-mobile cards go nuts?
Or has there to be both, bad T-Mobile card PLUS bad T-mobile cell base 
station?

How can a GTA01 be different than GTA02, if they have same GSM firmware?
http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=1024#c9

Reporters should include serial number printed on the simcard.

cheers
jOERG