How to distinguish the quality of mobile phone receiver

The test software does not seem, you can only call friends through their own testing, advise you not to hit a person, your friends can't hear your speech, it may be his signal is not good, when you call again to ensure you are very good, call your friend. Choose a friend in the city, is also his signal better, give your friend a few different, if this is the case, it is certainly a problem with your microphone. To a repair shop that people can use the special instrument to test. No change in it, not much money, now a lot of new mobile phone has such problems. Also do not know you is not intelligent mobile phone, mobile phone if it is smart, you'll have to try to restart the proposal. There is your SIM card capacity do not know much, such as Fruit is 64K and it is not a problem, if greater than the capacity, it is also possible that the phone does not support such a big card, the solution can only be changed for the card. According to the above, should be solved, if not we can determine the transmitter is a problem, I wish you good luck.