Can I put the telecom card and mobile card on the dual-card dual-standby mobile phone, only making calls, answering phones, sending and receiving short messages, and not surfing the Internet?

Dual-card dual standby may not be able to put telecom cards and mobile cards, depending on which one the mobile phone system supports.

Dual-card dual standby means that two SIM cards (two phone numbers) are placed in the same mobile phone, one of which is in a call state and the other number also has an incoming call, so the call is in a waiting state and can also be set to a busy tone state.

Understand this truth, and you will be clear.

There are three 3G standards in China, namely WCDMA (China Unicom), CDMA2000 (China Telecom) and TD-SCDMA (China Mobile). 2G has two standards, GSM (China Mobile, China Unicom) and CDMA (China Telecom). WCDMA is compatible with GSM system.

Therefore, dual card dual standby may not be able to put telecom cards and mobile cards, depending on which mobile phone system supports.

1. If the mobile phone supports GSM and CDMA systems, you can put mobile cards and telecom cards.

2. If the mobile phone supports WCDMA and GSM, you can only put the mobile card or Unicom card.

Therefore, when buying a mobile phone, you must look at the standards supported by the mobile phone.