Telecom Business Hall is the only self-service client for mobile Internet users designated by China Telecom Group. Through the telecom business hall client, you can carry out self-service such as inquiry, payment and handling, experience telecom services anytime and anywhere, and master more preferential information.
Mobile phone cards generally refer to SIM cards, which are IC cards held by mobile users of GSM system, and are called subscriber identification cards. GSM system identifies GSM users through SIM card. The same SIM card can be used on different mobile phones. GSM mobile phone can only be used in the network after inserting SIM card.