IMEI numbers, signal strength

Can someone help with these? 1) With the GSM debugger phone, how difficult is it to get only IMEI numbers of received packets? 2) Can the debugger phone report the signal strength of received packets? If not, is it possible? 3) Is there any way with mods to get I/Q out of the DSP? 4) Is there any work going on to make a CDMA debugger phone? 5) Are there any GSM phones that have an option to force calls to be made only on 3G/4G? Thank you, Ben