GSM 850 Limitations

Nils Faerber nils.faerber at
Fri Aug 31 23:02:51 CEST 2007

Gavin Rogers schrieb:
> Hey guys,
> I've been playing with the new phone and one SERIOUS source of
> frustration for me is the fact that a fully operational SIM card (tested
> within 1/4 mile of tower to be working) will respond to AT commands when
> placed in my GTA01 but however AT+COPS gives an error.
> The only service I have for miles and miles is GSM850. Is there any
> workaround to this? Can I enable GSM 850 somehow?

If AT+COPS gives error, instead of an empty list, then the modem might
still be switched off?
Try AT+CFUN=1 first, then AT+COPS=?

> gavin
  nils faerber

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