We are pleased to introduce hot product for you:

General double card

TWIN CARD is that one cellular phone can take two(three) sim card system and not need open case to install it very easy. any user will be completed it in one minute. It's very important that our products keep the original size, style, fashion.

Pls see following picture for get more detail.
If you are interested,pls contract with us asap.

Best Regards