Overview: Micro Sim Adapter for Unlock iPhone 4 This adapter is designed to unlock your iPhone 4 so that your iPhone can work with your own carrier.WORKS WITH ALL GSM CARRIERS! Compatible with Firmware Versions 4.1 / 4.2.1/ 4.3FIRMWARE 01.59.00 / 02.10.04 / 03.10.01 Does not work with the IPHONE 3G/3GS or the 2 G No cutting Required Instructions included in packaging NO signal lost No cut is required for this sim Unique slim chip design fits perfect How to usestep 1. Turn on your iPhone & insert your SIMCARD & this Micro SIM adapter together with the metal SIM tray provided.step 2. Turn on your iPhone & wait for the SIM welcome menu & then select "accept"step 3. Then wait 15 seconds, dial"112"then click on "SEND" hang up within 2 seconds. (do not make it connected).step 4. Then go to SETTING, and turn AIRPLANE MODE to ON & wait until you see "NO SIM Card Installed" & then turn off AIRPLANE MODE.your phone should have signal after a few seconds.NOTE:1. After completing all of the above steps & there is still no signal, power off your iphone, Repeat steps 1-4.2.TO use 2G/3G network, go to SETTING, then GENERAL then NETWORK then turn on " Data Roaming".you also need to go into Cellular Data Network & enter your APN.3. You can do a language selection for the Welcome message at the STK menu.4. If you do not see the welcome menu showing up, you can go to " Setting"-"phone"-" Sim Applications" & select it manually.5. It might not compatible with some old version SIMCARD, please replace a new one & continue.FQA:Q: Does 3G or Edge Network work & GPRS?A: Yes, with the data plan with your provider, T mobile only work on the edge not on 3g plan.Q: If I turn off the phone, do I have to repeat the Procedure?A: Yes, it will take 2 mins to reset it Q: How many iphone 4 can this Gevey Sim Unlock?A: Only 1 iphone 4, because it must attached with the provider sim.Q: Will it work in my country?A: We have tested for most of the countries & carriers. It should work for all carrier but we don't have the sim from each carrier to test.Q: My Phone have a password lock & I cannot get into the phone will GEVEY sim fix this?A: This adapter will not disable the pass code for you, you will need to restore it. Specification: Weight Approx:2g Size Approx:1.9 x 1.6 x 0.1 cm