If you travel frequently, it is recommended to take your ID card to the Unicom self-built business hall and upgrade the current 2G package to 3GA package or B package.

Domestic (except Taiwan, Hong Kong and Macao) 3G package calls have the same price, no roaming charges and long-distance charges, and the answer is free.

Package A is mainly aimed at users with more Internet access, and gives more traffic than packages B and C of the same grade. B and C are mainly aimed at users who talk more. The difference is that B is suitable for users who travel frequently and have more calls all over the country, and C is suitable for users who have more local calls.