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

1) Switch online or Auto-switch online without turning on-off
2) Max 99 minutes available for you to self-set auto-switching time(unique)
3) No data lose when switching 2 numbers or turning on-off
4) Super slim design with special general dual sim card IC for stable quality
5) Show Actual number on screen, number editable
6) Compatible with all GSM cards(including 850HZ,900HZ,1800HZ,the latest 1900HZ 64K,128K SIM CARDS)
7) Best compatibility in this field to the newer mobiles
8) Language selection: Turkish/English or Russian/English or English/Chinese
9) 100% satisfaction guaranteed