The general information of Dual SIM cards Our company has developed eight generations Dual SIM cards from the first generation Dual SIM card in 2000 .We make the dual SIM cards to the top in this industries. The function of Dual SIM cards 1. Can choose any GSM mobile phone card NO freely. Give or receive a call with profitable mobile card NO . 2. Separate business and private life ,let you have more private room. Protect your private 3. Change mobile card NO when you need ,save the charge, save roam (long distance call) charge. 4. Protect SIM card. Avoid losing or damaging.

　History of Dual SIM cards

Dual SIM cards(1th Generation)----- Back –cover Dual SIM cards:This mode need to fit for the special mobile and need to change the appearance of mobiles as it is joint of the back cover modes and dual SIM cards modes.

Dual SIM cards(2nd Generation)--------King of Dual SIM cards :This mode won’t need to cut original SIM cards. But there are 2-3 mm space between the battery and back cover. So it only fits for the special mobile phone.

Dual SIM cards(3 rd Generation)------The first generation of universal of Dual SIM cards . We use the Super-thin chip and FRC in order to guarantee the quality. The design is more cute and convenie nt. It needs to cut sim cards, and switch by on off mobile. The capability of this item was improved.It almost fits for all the GSM mobiles.

Dual Sim cards(4 th Generation)----- The Second generation of universal of Dual SIM cards .It includes the function of the first generation of universal of Dual sim cards. We use the Super-thin chip and FRC in order to guarantee the quality. Need to cut sim cards. Don’t need switch by on off mobile. Support switch on line. Fit for GSM.

Dual SIM cards(5 th Generation)----- The third generation of universal of Dual SIM cards.It includes the strong point of t he first and second generation of universal of Dual SIM cards. We use the Super-thin chip and FRC in order to gurantee th quality.Function: switch on line+Dual sim card NO on line .Fit for GSM.

Dual Sim cards(6 th Generation)----- The fourth generation of universal of Dual sim cards .It includes the strong point of the last three generations of universal of Dual sim cards.
Function:switch on line+Dual sim card NO on line+set switch time (3/6/9 minutes).Fit for GSM mobiles

Dual Sim cards(7 th Generation)---- The fifth generation of universal of Dual sim cards. Funciton: Can edit sim card NO + The Dual sim card No on the screen of mobile+Switch on line. Fit for GSM mobiles.

Dual Sim cards(8 th Generation)----- The Sixth generation of universal of Dual sim cards. Include the strong points of all previous Dual SIM cards . Function: :switch on line+Dual sim card NO on line+ Dual sim card No on the screen of mobile +set switch time . Fit for GSM.

Introduction of mobile phone dual SIM cards----------------------King of dual SIM card
Features:
1. Use the original imported card and FPC soft flexible board .It’s very steady and credible.
2. Super-thin design, no need to cut the original SIM card. No changes to the mobile phone.
3.Easily to install. Using conveniently.
4. One model can be suitable for all kinds of mobile phones.

Introduction of mobile phone dual SIM cards----------------Universal dual SIM cards
Features:
1. Super-thin 2 in 1 design. Keep the same shape with the original SIM card.
2. Use the original imported card and FPC soft flexible board .It’s very steady and credible.
3. Easily to install. Using conveniently.
4. One model can be suitable for all the GSM and CDMA mobile phones.