Làm cách nào để kích hoạt 4G trên Vivo?
How can I connect to 4G network on Vivo? How to change the network mode on your phone You can change the network mode on your phone by going to Settings>(Dual SIM cards and )Mobile network>Network Mode. There, you can select the 2G, 3G, or 4G option that you prefer. If you have 4G coverage …