Can I use Unicom CDMA mobile phone to send short messages when traveling to Thailand?

Methods of searching the Internet by foreign mobile phones;

1. Confirm whether the mobile phone supports the network frequency band of the country where it is located (some models will realize different network frequency bands when roaming internationally).

2. Unicom version of the mobile phone supports changing the network frequency band to search the network in China. Please refer to the following path: Settings-More Settings-Mobile Network-Network Mode: 1. GSM/WCDMA (automatic mode); 2.GSM only; 3. WCDMA only.

Note: Telecom custom machine and Mobile custom machine generally do not support changing network frequency bands.