How does Unicom card send SMS to upgrade 4G network?

In order to let users enjoy the 4G network, China Unicom has successively upgraded to the 4G network for users of 2G/3G (except 20 yuan prepaid cards and 3G wireless network cards) for free! After the upgrade, you can enjoy high-speed 4G Internet access in the coverage area of China Unicom's 4G network by using 4G mobile phone and turning on 4G network settings.

Tips: The policies for opening 4G networks are different. Please refer to local provincial policies.

Take Guangdong Unicom as an example. Guangdong 2G/3G users (except 20 yuan prepaid cards and 3G wireless network cards) who have not received SMS prompts to automatically open 4G networks can apply for opening by themselves in the following ways:

1. Send "KT4G" to 100 10, and the opening will take effect immediately;

2. Pay attention to and enter the "Guangdong Unicom" public micro-signal > Hotspot > open 4G for free (if it is not bound, prompt to bind), and click the switch button on the right side of "4G Network" to open it;

3. Dial 100 10, and press the "3-8" key at the voice prompt of IVR self-service to automatically open the 4G network function;

You can contact human customer service to open a 4G network for you.