Why can I only make calls but not send messages when using China Unicom card on iphone4s 6.0.1?

Hello

This may be the reason why your SMS center number was not set successfully.

The steps to set the IPHONE SMS center number are as follows:

How to query on the IPHONE mobile phone: Dial *#5005*7672# with iPhone

Setting method:: Use iPhone to dial *5005*7672* 86 "SIM card home SMS center number" #

Delete method: Use iPhone to dial ##5005*7672#

Note: Set SMS The center number is usually 86 followed by something similar to a mobile phone number. When setting the SMS center number, please re-insert and unplug the SIM card. It is recommended to delete the SMS center number first and then reset it, and it will be fine.

For the SMS center number, it is recommended to consult the local 10010 customer service.