Sunda International Industrial Co., Ltd. is the professional manufacturer of dual sim card,multi sim card,twin sim cover----double sim card, double sim card holder etc.

1) latest technology of its kind ,supports 6 numbers support fast sim reader use 7.14 Mhz resonator to achieves high speed cracking which can makes 3 times faster than similar products available on the market
2) applied to all GSM phones ,no restriction on phone brands or models super large phone book capacity with 200 numbers and 40 SMS active number show on the screen
3) switch mobile number online without powering off and on handset keep all talking record
4) Re-writable to any number of with original card