IPhone4S and China mobile (the Po) part of the user's SIM card being not compatible problems has been more and more users shows. Yesterday, the reporter understands, work the letter to this problem has not tell laboratory testing.
At present China mobile and apple are foreign say the problem from the software. But there are also the industry technology researchers think that the phenomenon is caused by the hardware, a viewpoint that mobile use GSM network frequency range iPhone4S than the support of the GSM network frequency band, and so in some mobile network coverage area iPhone4S would find no signal; Another view, iPhone4S and iPhone4 compared, in the GSM communication protocol stack made some changes, and that some old version of the mobile SIM card can read, can by changing the way new SIM card to try to solve.
Reporters who want to work from department is responsible for cellphone products letter into the authorities tell laboratory testing to find answers. But tell laboratory says, on the issue to technical analysis needs to have relevant direction laboratory put forward an application, there has been no party has suggested this application.
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