试

spark7

1.        In GPRS network, how many types are network operation mode?
Tell me the difference. How many types are Mobile phone classes? Tell me the difference.
2.        Which number plan is used in GSM network, E164 or E212? Tell me the difference?
3.        My friend’s phone number is stored in my SIM card. It could be found in other phone but mine. Could you please list some possible reason?