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 16 numbers support fast sim reader use 7.14 Mhz,

2)applied to all GSM phones ,no restriction on phone brands or models super large phone

3)book capacity with 500 numbers and 40SMS active number show on the screen switch mobile number online without powering off and on

4)Re-writable to any number of with original card