Can China Telecom's number be used in Hongkong? That helps.

CDMA can be used in Hong Kong. You have to call China Telecom and ask him to start international roaming. You can deposit RMB in 500 yuan before opening an account. There are two types. One is not to change the international card, but you can only use the C network in Hong Kong, and you can't automatically switch to the GSM network when there is no signal in the C network. However, you can directly open a telecom customer service phone without going to the telecom business hall. The other is to change an international card in the telecom business hall and directly transfer it to GSM network instead of C network signal.

After the opening of the above two methods, you should send a short message according to the requirements of telecommunications, and you will get 6 English short messages, indicating that the opening is successful (it is not final if you don't receive it). Maybe you didn't do this last step.

Another customer service suggestion is to turn off the CDMA internet access function during international roaming, and the best choice is because international roaming is too expensive.

Extended data:

Mainland CDMA can be used in Hong Kong and Macao, no problem, no need to change your mobile phone. Even if you want to insert a Hong Kong card, you can do it.

However, most of them need to open international roaming. For details, please consult the hotline 10,000. But it's best not to use telecom mobile phones to go to Hong Kong. Only one PCCW in Hong Kong supports telecom roaming, and the signal is very poor.

Either mobile or Unicom, or directly buy a local phone SIM card and plug it in, which is very convenient and cheap. It only costs more than 20 cents to make a domestic call for one minute.

References:

Baidu encyclopedia? code division multiple access