Telecom dual card machine, how to surf the internet with mobile card?

1, in most cases, the telecom dual card machine, card slot 1 supports the telecom network and can surf the Internet. Card slot 2 supports mobile and Unicom's 2G network, and can only make phone calls and send short messages, but can't surf the Internet.

2. There is also a telecom dual-card slot 2, where you can use a mobile card (or Unicom card) for GSM Internet access. However, the card slot 1 needs to be disabled at this time.