Features: 1) Max. 99 minutes available for users to self-set auto-switching time 2) Displays SIM1 or SIM2 phone numbers on screen (ID number editable) 3) Compatible with all GSM mobile phones 4) Economical and convenient, enjoy the freedom of two mobile numbers in one handset 5) Ultra slim design with advanced IC guarantees stable performance 6) Saves money by easily alternating between local numbers of 2 different cities/networks, allow users to call out economically by one numbers, and answer freely by another number 7) Separate business call from private call; offer users more space, freedom and privacy 8) 6-month limited warranty (damage caused by inadequate operation is not covered) 9) 100% satisfaction guaranteed Installation: 1) To take out attached transparent stickers and tear off one piece of it 2) Put transparent stickers on the back of SIM card as diagram 1 3) Cut the SIM card following the dot line with scissor as diagram 2 4) For more convenience, users can use the special pincer made by our company to cut it as diagram 3 and diagram 4 5) To cut the other SIM card by the same way 6) The well-cut SIM card is as diagram 5 7) Take out the stainless steel plate from general dual card and then install the two well-cut SIM card into the general dual SIM card holder 8) Insert the general dual SIM card into the mobile phone, ready to enjoy a free life with two SIM cards in one mobile phone Usage: 1) Enter phone menu and choose dual SIM, it shows SIM-1, SIM-2, Auto/SW and Setup 2) If users want the card online separately, directly selecting \'\'SIM-1\'\' or \'\'SIM-2\'\' (a \'\'*\'\' will be showed before the selected card) 3) Select Auto/SW (\'\'*\'\' before it), the phone will enter the dual-number waiting state and the cards will be switched automatically 4) If users want more function, please select \'\'Setup\'\' menu; the submenu will show as below: a) SIM1 No. b) SIM2 No c) SW time: 03 d) Chinese 5) Select and enter \'\'SIM1 No.\'\' or \'\'SIM2 No.\'\', users could edit SIM1 or SIM2 with the maximum input numbers up to 12; after that, the present number will be displayed on the screen 6) Enter \'\'SW time: 03\'\', users could set the auto-switching time; the default setting is 3 minutes; the auto-switching time is from 0 to 99 minutes 7) \'\'Chinese\'\' (\'\'English\'\') is switching menu for the two languages Friendly notice: 1) If users only want to assemble one card, please assemble it in SIM1 position (There is symbol on the PCB) 2) If users want to recover the SIM card, just insert the card into the labeled recovering card and stick it tightly as diagram 9 3) For some types of phones with transverse inserting and hidden card, there are eight protruding labeled stainless steel flakes to avoid the pulling difficulty; such types as we know include MOTO V70; Nokia 8250, 8210, 3230, 2100, 6260, 6650, 8800; Hair 3000C; for normal phones, users are kindly suggested to use the labeled stainless steel flake with 12 protruding parts on each side; this kind of flake could make the products touch much more tightly and make the processing steadier; it is just one of our patent items 4) Diagram 1: stick the nondrying glue, please ensure the correct direction 5) Diagram 2: cut card, please follow the dot line 6) Diagram 3: put the whole SIM card into pincer 7) Diagram 4: fetch well-cut SIM card 8) Diagram 5: well-cut SIM card 9) Diagram 6: 7:8