I bought a GeoSIM card. It doesn't work fully with my Nokia 6310i phone. That was my fault - their website clearly says it won't. I can use it by dialling *125*1 etc so no great problem - except it would be easier if I could just call as usual.
I wondered
why it doesn't work. I read about USSD and STK (none of which I'd heard of before) and I trawled through the firmware versions to see if an upgrade might fix it. My conclusion -it doesn't work becausethe 6310i doesn't support STK (or maybe it does, but doesn't support 'call control' - I'm not sure which).
So I thought I'd see if I could get another cheap Nokia on ebay which would do the job. I regularly use IRDA and Bluetooth and GPRS and I don't need a camera, and i want one as similar to the 6310i as possible (I've used it for a very long time.)
This page gives a list of phones that don't work
http://www.globalsimcard.co.uk/compatibility.htm I know that list is incomplete: I tried a 6210 and it doesn't work.
This page gives a list of phones that are known to work:
http://www.geodesa.com/Global_SIM_Ca..._sim_card.html The Nokia list is very short. Some phones that might otherwise choose, like the 6810 or the 6230i are not there.
So here's the question. Is there any way of predicting from the spec whether a phone - the 6230i say - will work with GeoSIM (i.e. generate the callback request when I dial as normal.) It doesn't seem to depend on age: the 6100 was introduced in 2002 and is in the 'compatible' list.
Does anyone have a 6230i with GeoSIM?
Old Nokia phones:
http://www.gsmarena.com/nokia-phones-o-1.php
Dave