I have change my phone language to english. but the phone shows chinese language in the internet pages and with call details. how to change it. why is this occuring?

Question

i have change my phone language to english. but the phone shows chinese language in the internet pages and with call details. how to change it. why is this occuring?

Answer 1

If the phone is not unlocked, let's say for example it is locked to another carrier such as at&t, when you put in the Tmobile SIM in, the phone would complain about the SIM.
Does your phone do that? If yes, then the party that sold you the iPhone4S (if you purchased it from another person) may have not done the unlocking properly, and that may explain why Tmobile is insisting on the phone being locked.
If you purchased your iPhone4S new from Apple, did you pick Tmobile, or did you choose unlocked?
If you picked the Tmobile choice, then it should come up ready to use.
If you picked the unlocked choice, then you would need to visit Tmobile to purchase a nano-SIM and usually they should be more than willing to help you, since you're paying for their service.
But as you have indicated, this phone is under AppleCare, so if it doesn't work with a supposedly good Tmobile SIM, the quickest way to fix this is to get a replacement phone. When we troubleshoot we always try the least time consuming methods first.
You may have noticed it, that a good number of unfortunate uses of the iPhone4S have had their wifi become strangely disabled after upgrade to iOS7. Your situation is the reverse, your wifi is useable but not your cellular network.
In the mean time, you can apply for a Google Voice account (see http://www.google.com/voice), and obtain a free North American telephone number. You can then download one of many free Google Talk applications. Set it up, and you will be able to call and receive phone calls using your wifi. This would be just for the transition period before you get a useable phone.
Google voice provides average voice quality calls to and from US & Canada numbers for free for 1 hour per call. You can use this as a temporary work around while you are waiting for your replacement phone.
Cheers!