What's the difference between OPPOa57t and a57?

Oppo A57t is a mobile 4G version, and can only use mobile 3G and 4G networks.

Oppo A57 is a full netcom version, which can use Unicom 3G, 4G and telecom 2G, 3G, 4G networks.

A.A57t is a mobile 4G+ mobile phone, which is a mobile cooperative version. The hardware configurations of A57t and RA57 are the same, but the network standards are different. The specific network standards supported by A57t are as follows:

When using a single card, it supports mobile/Unicom/telecom 4G+/4G/3G/2G;

When dual cards are used, when both cards are mobile cards, the 4G+/4G network can be switched freely;

When dual cards are used, one card is mobile, and when one card is other cards, the mobile card can use 4G, and other cards can only support 2G call and SMS functions, and cannot access the Internet;

When dual-card is used, neither card is a mobile card, so you can freely switch to use the 4G network.

2.OPPO A57 is a mid-range mobile phone launched by OPPO, with a 5.2-inch screen, built-in 3GB RAM+32GB ROM and support for 128GB memory card expansion. Equipped with front16 million+rear13 million pixel camera, equipped with 2900mAh battery, running Android 6.0. 1 system, there are three colors of gold, rose gold and black.