Specifications: Product Name:8th generation General Dual SIM Card Model Number: XBX-008 Price: USD2.20for Min order 500pcs, if you order big quantity, prices negotiable On the mobile screen, there is SIM 1 or SIM 2, and you can edit SIM 1 to the numbers of SIM 1 And you can edit SIM 2 to your the number of SIM 2, then you can know clearly what you are using. With this one, you can have Two numbers switching to each other every 2 minutes~30 minutes (you can write the time you need in the phone Menu). Product Name:5TH NEW KING OF DOUBLE CARDS Model Number: XBX-005-B Price: USD3.50 for Min order 500pcs, if you order big quantity, prices negotiable Specifications: 1) Dual SIM card for all GSM mobile phones, NO NEED TO CUT CARDS 2) Avoids charge for roaming and long- distance calls 3) Message receipt available when power off 4) Ultra slim design with soft, double IC import FPC board 5) Dual SIM card selects one card to work automatically on power on, Reset the phone to access the other, CAN USE MENU IN PHONE TO CHOOSE SIM 1, SIM 2, BOTH ONLINE (SWITCHING EVERY 2 MINUTES 6) Set call divert on mobile to use both cards synchronously on one Mobile phone 7) Set meet communication function for multi-communication 8) Six month limited warranty Inner packing: Dimensions:3.5 x 7.3 x 0.13cm N. W.:1.52g Outer packing: Dimensions:5.9 x 13.3cm G. W.:4.23g