1. Twin sim adpters can't work properly if you doesnt close PIN code.( for SIM card rejected )

2. When use the dual sim card ,After finish reading the message and phone book , then handle the function , so that sunda dual sim card works properly .( For example, when you operate the computer , you operate other function while unfinished the program , the computer will be dead , the same as the sunda dual sim card

3. When switch on line for NOKIA mobiles , it will appear whether updating SIM card.you press cancel, it will switch automatically. ( You can try to dial other mobiles to check whether it is normal to switch . please try many times for the different characteristic)

4. Switch numbers with NOKIA and MOTO mobiles , the mobile will show"please inset SIM card", it will be ok after a minute

5. When you can't find SIM card after inserted into mobile , You should add one sponge to make the dual sim card more tightly. Or you can use the ball pen to prick the 12 small bulgy spots , increase the thickness , in order to make contact well.

6. Using sunda dual sim card, if the sim card rejected , maybe it is without good cutting , please check the bulgy spots and adjust the position or clean the sheet copper of the dual sim card .When the chip is is close to the top edge of the sim card , you can use cutter ; when the chip is in the middle of the sim card, you'd better use scissors .

Q:Sunda 14th dual sim card the unique and new function:
A: After startup Auto switch, SIM1 is on line , SIM2 can't connect at the moment. This is a newest ,unique and originate function all over the world. The system voice informed that the number you dialed can't connect at the moment . (suitable to 70% mobiles)

Q:What kinds of customer will choose cutting card?
A: Have two cards, accept the cutting card and strive after perfection ,fashion and popular , no limitation and convenient .It is suitable about 99% mobiles with (B7-13) cutting dual sim card.
Q: what kinds of customer will choose non cutting card?
A: Have two cards ;not accept the cutting card ; save trouble of changing card,switch number and no need to modify mobile. It is suitable about 85% mobiles with two configurations non-cutting dual sim card(C5-11,12).

Q: Is there a limitation in mobile?
A: The cutting card is suitable for 99% mobiles ( B7-13) with the different program design in battery ,sim-place, module
The non cutting card is suitable for 85% mobiles (with C5-11,12) with the different program design in battery ,sim-place ,module

Q: Is there a limitation using SIM card?
A: It supports mostly kinds of GSM and 3G sim card from telecom carrier presently . and also supports encrypt format and operate system
(2) The original extra function program of SIM will be replaced by STK function.

Q: Is it easily broken by human factor?
A: Our product used the most toughness and soft plank with the resistance to enfold and compression. Please trust use it , the product will be under guaranty without human factor and nature loss.

Q:Why cannot fold the mobile cover using non cutting card ?
A: Please use a little force to impact the battery tightly for the double cards thickness.
Q: How to resolve the fault by myself?
Answer: (1)when it appears"insert SIM card" , "Failed SIM card" , you can use the simply method to modify according as introductions .
(2) The product are used with other problems , you can return to the dealer or detailer you bought firstly , to get technology supports and assistance.

Q.The advantage of sunda dual sim card?
A:(1) Provide convenience . you have no need to take two mobiles and change card continuously.
(2)Economy and Practicality, only spending a little money ,you can easily hold expensive mobile's function..
(3)Saving charge , people who often is on business can use the different card in different place . local place using local card , out-of -town place using out-of-town card, it saves much charge

Q.Does sunda dual sim card fit all mobiles ?
A: Nowadays there are about 20-30 thousand mobile types produced in the market , and the new models are released quickly . At present ,though researching anc investigating , the cutting card is suitable for 99% mobiles(B7-13) and non cutting is for 85% mobiles(C5-11,12).

Q. Does sunda dual sim card fit all cards ?
A: our products have the best compatibility in the market.It is compatible to 850hz,900hz,1800hz,1900hz,32k,64k,128k sim cards.

Q.Is it easily to cut card broken?
A: Generally this problem will not happen , if you are according to instructions we provided . To emphasize that the quality and specification is very different from the standard card , for this cards you'd better use scissor to cut , and also including the too old cards.