IT Home February 19 news, according to China Mobile International Roaming said that because the AT&T network in the United States will begin to adjust from February 22, your call and text messaging services on the AT&T network may be affected.
If you encounter the above issues, we recommend that you try manually selecting the T-Mobile network, and the corresponding roaming rates remain unchanged. The manual network selection method is as follows:
Android phone: Settings - Mobile Data - Network Operator, manually select the carrier after turning off the auto network selection mode

Apple phone: Settings - Cellular Network - Network Selection, manually select the carrier after turning off the automatic network selection mode
China Mobile said there may be differences in settings for different phone models. We will communicate closely with AT&T and will promptly notify you of further information. If you have questions, please contact + 8613800100186.