plzzzzz guide me abt GSM SWAPs by gurpreet singh abt (RF,M/W,antennas )

TELECOM ENIGNEERS plllllzzz guide me abt GSM SWAPs.or tell me a web link where i can get my answe's pdf file.
(HOW MANY SWAPs IN GSM?& some detail of tht swaps.)
plzzz engineers help me.

What is the swap meaning? Does it mean swaping between GSM and CDMA?

Arduino Forum - GSM Module SIM hot swap

any engineer can tell me abt cable swap?