6230i - Unlocked but not working properly

Hi,

I've recently unlocked my nokia 6230i successfully with generated unlock code (+7). Sim card from other network are now working properly (i can turn it on), but problem appears when calling. About 3 seconds after connection is established, i hear three short signals (similar to the one we hear when phone is not available), and phone call is cut off.

I've been trying to find and answer or similar problem on forum without any good results :/ I did hear something about new types of restrictions in new phone models ?

Maybe it's worth mentioning that sending sms is working properly. There is also no problem when sim card from "original" operator is pluged in.

Would be grateful if someone can help.

Regards

That's a description of a barred/blacklisted phone
but you say that with "original" SIM inside it works ok :???: you can call out?

please give us more details as to which SIM work and which do not because some providers share the network and others share the barred IMEI list

cheers