Problems with caller ID
Obtaining caller ID, processing it and displaying it is actually a fairly complex process involving the caller's operator, yours, your SIM and your phone's software. If all you see when someone calls you is "Call 1" or "Private number", no actual phone number, then you're not receiving caller ID at all. This can be because the caller is in fact concealing their number (you can do this on a GSM phone by prefixing the number to dial with #31#). In this case, there's nothing you can do. If the caller IS sending out their caller ID but you're not receiving it, then the problem lies with your network and/or with your SIM. Give your operator a call. The chances are they can remedy this with an over-the-air update of your SIM card. If you are now receiving caller ID but your phone isn't displaying the corresponding contact's name, it's because it can't tell whose number it is. There are many possible reasons for this, the three most comm...