Features:

1. Set auto-switch time for SIM1, SIM2 respectively.
2. Russia and Englsih for you to select languages.
3. Display your SIM1 or SIM2 phone numbers on screen (ID number editable).
4. Max 99 minutes available for you to self-set auto-switching time.
5. Switch two numbers online.Compatible with all GSM mobile.
6. Economical & convenient, enjoy the freedom of two mobile numbers in one handset!
7. Ultra slim design with advanced IC guarantees stable performance.
8. No data loss when switching 2 numbers or turning on/off the phone.
9. Separate business call from private call, offer you more space, freedom & privacy.
10. Ultra slim design: 15*25*0.9mm,2-in-1 design and installation after cards cutting
    

Installation:

Parts of DS-4:

SIM Card holder	Transparent sticker-1	Plastic frames

Cover	Transparent sticker-2	Sponge

1. SIM Card holder: main part of dual sim card, use to install two cutted sim cards.
2. Transparent sticker-1(2 pcs):The transparent sticker with dashed line , help you to cut sim card.You cut the sim card along the dashed line.
3. The plastic frames (2 pieces): use to restore your cutted sim card to the original size. Put the sticker without dashed line on the back of it.
4. Cover(1 pcs) : use to fix two sim cards better. According to different mobiles, pls select to use different cover.
5. Transparent sticker-2(2 pcs) :The transparent sticker without dashed line (two pieces): use to restore your cutted sim card
6. Sponge(1 pcs): after you insert our super twinsim card in your mobile,if it can't connect well, pls use it to make SIM card connect better.

Steps of installation:

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