PREMIUM GENERIC SFR FRANCE ALL GSM SUPPORTED
XPERIA - LUMIA - SAMSUNG - ALL GSM LOCKED TO SFR FRANCE
THIS SERVICE PROVIDED ONLY NCK (Network Unlock Code)
SAMSUNG: Check that your phone does not request a code other than the NCK and that when you insert a not accepted sim it requires the code unlocking network and not UNFREEZE code or PUK code etc...
If the code does not work for Samsung, this is because your Samsung is Freeze, and therefore the code will not work, no refund can be requested because the codes come from SFR directly.
NOKIA: there is more manipulation to enter the code on the nokia, and particularly difficult with nokia type SL3, for Lumia check that the counter is not blocked and that the phone asks for the code unlocking network.
SONY ERICSSON: You must check before any orders that the unlock counter is not blocked.