i-Smart Phone Operator Network SIM Card Unlock Attachment (Ultra Thin)

Pros: It is thinner than a previous version and when placed properly, it's a good and useful thing.

Cons: It doesn't work with every mobile and sometimes it needs to be persistent to place all contacts of SIMs and phone on top one another.

Other: My estimate is that you have 50-50 chance to make it work or be lucky (also unlucky)
The risk is not too big for that price and it is worth of money.
If you can't make it work, sell it to someone or make a gift to someone.

Pros: It does the job! I boght this to unlock a Nokia 2760 that is very difficult or expensive to unlock and i did it in 30 seconds for less than 4€. No cutting needed, at least for this phone.
Also tryed it in a Samsung SGH F-250 and also didn't need to cut the sim card. Very thin and the chip is well proteted.

Cons: In some phones it may need cutting. It depends on the slot where the sim card is inserted.

Other: Buy it!

Pros: Nice idea and acceptable workmanship.

Cons: Tried it on Motorola and SonyEricsson K770 and it did not work. It did not work even with original SIM card, which means that Unlock attachment is not correctly interpreting – passing data between original SIM and phone (Europe , VIP network SIM V2). For ease of insertion original cards usually needs cutting of one corner (one which holds CHIP on thin card).

Other: If you like to experiment with cheap way of unlocking phones this product is worth to try. Check manufacturer data if you can find it.

Pros: Easy to use Cheap! Works almost everytime Works with swedish phone companys like 3, Tele2, Halebop and Telia. (Those are the ones ive tried and got it to work with.)

Cons: Can be fragile; if you try to push it straight in it can bend and be more or less useless afterwards.

Other: Bottomline? Buy it. The low cost guarantees that you won't feel cheated and personally i just keep buying more and more, because they work and therefore i run out since i have to unlock peoples phones. ;)