How does Lenovo a3900 set up 3g network?

Lenovo A3900 (Mobile 4G) mobile phone, network mode: Mobile TD-LTE, Mobile 3G(TD-SCDMA), Unicom 2G/ Mobile 2G(GSM).

1. Support Unicom's 2G network, use Unicom card, but only Unicom's 2G network.

2. If you move 3G or 4G cards, you need to install them in card slot 1, because card slot 2 only supports Unicom 2G/ Mobile 2G(GSM).

3. If you use a mobile card with card slot 1, you can enter System Settings-More-Mobile Network-China Mobile-Network Mode, and select "3G/2G Mode Only", that is, 3G network access is preferred (2G will be automatically switched if the 3G signal is not ideal).

If you have more questions, you can go to the music bar for consultation:/