What should I do if the US version 4sa1387 has a telecom card but no signal and can only get signal by dialing *228?

Hello, first of all, thank you for your attention and support to China Telecom. According to your description,

The iPhone 4S with the number A1387 is the telecom version. When you insert the telecom card, it shows no service. It is recommended that you try another telecommunications card. If another telecom card can be used, it may be that your mobile phone card is damaged. You can go to the telecom business hall with the owner's ID card to get a replacement card.

The reply is for reference only. For details, please consult 10000 or log in to Anhui Telecom’s online business hall ah.189.cn. Anhui Telecom will serve you wholeheartedly. I hope my answer will be adopted by you.

Anhui Telecom’s “Deposit into the bank and get a mobile phone for 0 yuan” activity is online! Go to a bank activity branch with your ID card and bank card to make deposits and get free mobile phone services. As long as you make a deposit in the bank and commit to the minimum consumption of the mobile phone package and the length of time you are online, Anhui Telecom will give you a mobile phone for free, and you can also earn interest on your deposit.