Re: GSM roaming question
On Tuesday 29 September 2009, Mikhail Umorin wrote: > Hello -- > > I cannot access network in certain locations (in Texas, USA) on my FR using > ATT SIM card. However, when I use the same SIM in the ATT GoPhone that came > with the card, I have access to a network. "Operators" button in the phone > settings in SHR-U shows only "Automatic" and "T-Mobile". > > So, is this roaming problem a bug? misconfiguration? not implemented? not > possible? It could be as simple as the GoPhone being more sensitive than the Freerunner. Which network does the GoPhone connect to? The Freerunner should default to Automatic mode. You can find this if you press the Modem information button in the settings app and scroll down a little. It should also tell you the network it's registered with (if any) and whether it's your home network or not. Signal strength should be in there too with more detail than bars/blobs. Automatic mode means the gsm firmware is in control of which network it registers to. This should be the home network if available, or any other allowed network if not. There is an AT command to list the order of preference for picking other networks, but I don't remember what it is, or whether it is provided by the SIM. It's not something you should normally need to touch though. If it says "T-Mobile" instead of "T-Mobile [forbidden]" you should be able to click on it to register with T-Mobile. I don't know enough about the US GSM market to know if this is likely though. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: GSM roaming question
On Wed, Sep 30, 2009 at 12:48:14AM +0100, Al Johnson wrote: > Automatic mode means the gsm firmware is in control of which network it > registers to. This should be the home network if available, or any other > allowed network if not. There is an AT command to list the order of > preference > for picking other networks, but I don't remember what it is, or whether it is > provided by the SIM. It's not something you should normally need to touch > though. it's the preferred operator list, stored on the SIM, and typically you can even edit that file on the sim card (i.e. the filesystem permissions of the SIM's internal FS permit modifications). Motorola EZX phones or very old siemens S2/S3/S6/S10 have the feature to add/remove entries to the preferred operator list. I agree, in normal operation you should never have to care about these. -- - Harald Weltehttp://laforge.gnumonks.org/ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community