a really useless gimmick

Since my Samsung S3 NFC-capable is, I wanted to try this feature by NFC tags and the original stickers have ordered from Samsung.
The stickers in and of themselves are in Ordung, even if they had I think the design can be made more subtle and prettier.
What I had foolishly not previously informed me, was the fact that all this function only works if you activate the mobile phone, ie the screen is unlocked. This is probably required for safety reasons.
I had the right to use one of the NFC tags in the car, so when my phone Bluetooth is turned on and it connects to the hands-free, as soon as I put it on the day in the car. Honestly, I feel the day as no relief, because if I have to cancel anyway lock screen when entering, then it is also no longer a big deal to tap Bluetooth in the shortcut bar. Similarly, I feel with all anderne functions that I have programmed in two other tags. The functions are not complex enough to work or time in relation to the operation saves here right on the phone.
For me, NFC would make sense only if I keep the phone before not "operate", that would have to unlock, but only to the day.
So is all just a gimmick!