1. universal twin cards:: normal universal twin card, USD3.00for minimum 100pcs.This is uiversal for every model of mobile phone, you can see manual how to use it very easily.USD2.90 for 500pcs, you need to switch off to go to another sim card number for this model. Details, please see manual 2. General double cards (3rd generation, NEW), USD6.00, This is uiversal for every modle of mobile phone, you can see manual how to use it very easily.USD5.5 for 500pcs, No need to switch off to go to another number, just operate in the menu: SIM 1, SIM 2, BOTH online. So you can use one number, or you can have two numbers online at the same time (every 3 minutes automatic exchange) 3. Card cutter (card princer machine): USD15.00/pc