Behind the scenes: Unlocking iPhones in Vietnam

Once the chip was extracted, it was Tuan Anh's turn. He used a chip reader to read information into a file. He then used a Hex editor to remove the locking data from the file and, after that, the chip was reprogrammed with the newly altered file. Now it was no longer programmed to work with only a specific provider.

The chip was then reassembled into the motherboard, another painstaking process.