changing sim card is a feature of my provider. one simcard, 2 different numbers.

bt adress and something else was only to test wich codes work.

... in the future i will use a twincard adapter for using 2 simcards. for that i need sim toolkit or ussd codes.

i try to find someone who has a dualsim adapter and can try out the codes with the ussdquery. or maybe some people using other providers, to find out where the problem (if there is one) is.

thank you for your help