Do you have a new iPhone 3GS that you wish to unlock with iPad baseband 6.15.00? Before you do it, please read these important notes first or else you will brick it forever!
UPDATE: Don’t risk breaking your iPhone with the iPad baseband, unlock your AT&T iPhone 3GS permanently. Read more here.
Most of you would have known it by now that Apple updated the chip on all iPhone 3GS made after week 28 of year 2011. The new NOR chip which is mass produced by Intel/Numonyx has the model number of either 36MY1EH or 36MY1EF (see image above for the bottom right chip marked in ‘yellow’ for location of chip on the logic board ). They are not compatible with iPad baseband 6.15.00. It’s exactly the same type of chip used on iPhone 4.
You can check this by looking at your iPhone 3GS’ serial number. The 3rd, 4th and 5th digital of the serial number represent the week and year the logic board was produced.
- 3rd digit: Year
- 4th and 5th digits: Week
For instance, if your serial number is xx129xxxxxx then you can tell immediately that the logic board was produced in year 2011, week 29th – not compatible with iPad baseband.
Aside from judging the serial number, the best way to be 100% sure is to physically check the NOR chip on the logic board. This is because you may have a refurbished model that may still have the old chip 36MY1EE that can be safely flashed with iPad baseband. Some people reported that they successfully installed their 3GS with iPad baseband even though the serial number told them otherwise.
How to physically check if you have an older 36MY1EE or newer 36MY1EH/F chip:
- Disassemble your iPhone 3GS by following the tutorials on iFixit (Warning! this will void your warranty).
- Carefully remove the bottom half of the EMI shield. (see YouTube video below)
3. Take a look at the bottom left corner and see the marking on the chip. If the chip is marked as 36MY1EE, then it’s safe to flash it with iPad baseband. Otherwise, don’t attempt to flash it otherwise you will break your logic board.
If you have attempted to flash it with iPad baseband and your baseband, IMEI, bluetooth and WiFi are now missing, then consider getting it fixed here.
Remember! Always check your serial number and do not attempt to flash it with iPad baseband if it has either the Numonyx 36MY1EH or 36MY1EF NOR chip, or simply unlock it forever if you have an AT&T iPhone using this.