Hi Michael, there are AT commands for managing the operator the phone connects to. As an example, in the AT manual of the Ericsson R520m (R520_DG_AT_R1A.pdf) I found
AT+COPS (Operator Selection) which lists the available networks and allows to manually connect to one of them or to do it automatically. I have not checked whether that is a standard command or Ericsson specific. Actual SIM cards hold a list of preferred networks which can be preconfigured by the operator who sells the phone. That makes particularly sense if the operator has partner companies in many countries in which he offers cheaper roaming and additional services. Like e.g. Vodafone does. In the same file, related comands to managing the preferred networks list are AT*EPNR (Read SIM Preferred Network) and AT*EPNW (Write SIM Preferred Network) That is probably what you are looking for? Best regards, Bernd.. -- It�s Radio-Time! wireless data in the web: http://www.dafu.de (German language only) Report on Premium SMS (175 pages) by Bernd Mielke http://www.dafu.de/rechts/psms-en.html DILWORTH MICHAEL wrote: > > I meant the last .. As defined in the GSM specs. Yes I want to change > the network the phone uses for roaming purposes. > > I am not 100% sure of what GSM spec I need or where to get it from. > > Thanks > > mike > > > -----Original Message----- > > From: Jacques Caron [mailto:[EMAIL PROTECTED] > > Sent: Tuesday, November 18, 2003 4:25 PM > > To: DILWORTH MICHAEL > > Cc: [EMAIL PROTECTED] > > Subject: Re: OTA specs PLMN > > > > > > At 15:02 18/11/2003, DILWORTH MICHAEL wrote: > > >Can someone please send me a URL where I can get hold of the > > OTA specs. > > > > I guess you mean OTA provisioning? Or OTA download? Or the > > OTA interface of the GSM network? > > > > First two cases, there not a single OTA spec, but several > > (Nokia/Ericsson, > > Openwave, OMA... for the first case, Nokia Smart Messaging, > > Download Fun, > > EMS, MMS, OMA... for the second). The last case is of course > > defined in the GSM specs. > > > > >I am particularly interested in updating the PLMN. > > > > What do you mean by "updating the PLMN"? You want to change > > the network the > > phone uses? This is not a phone decision (or rather, not > > only), but mainly > > a decision by the network to let the phone use it or not. > > This is quite > > obvious since there is billing involved. > > > > If what you are looking for is something else, please be more > > specific... > > > > Jacques. > > > > > > -- Interactive Media Factory SARL > > SMS, SMS+, IVR & WAP development and services > > http://www.imfeurope.com/ > >
