If you have inserted the UnlockMySIM sticker in your iPhone and cannot connect to the network of your choice, perform the following checks:
1) Make sure your iPhone is free of additional security measures such as the iCloud Activation Lock, Find My Phone and hasn't been blacklisted by the original operator due to loss, theft or non-payment. These restrictions can only be removed by the owner of the iPhone or Apple.
2) Check you placed the UnlockMySIM sticker correctly under your nano-SIM.
3) If possible, try the sticker in another locked iPhone to rule out a potential manufacturing defect.
If you still cannot get the sticker card to work after performing these checks, contact us for assistance using the Online Help button.