Price: 5/5
Ease of use: 4/5
Build Quality: 4/5
Usefulness Rating: 5/5
Overall 5/5

Pros:

* Tested and Working on my Sony Ericsson w880 - Locked to Tele2. (Insert Correct Sim)
* Takes next to no skill to modify your sim card to work with this.
* Over 24 Hours has not lost Connection with the Network
* Came in a plastic case inside a anti static bag.
* Tested with phone call over 30 mins - No Drops.
* Tested with 10 SMS Sent and Received Fine.
* Tested with 10 MMS Send and Received Fine.
* Tested with GPRS Data Connection Worked Fine.
* Tested with 3G Data Connection Worked Fine.
* Tested with Video Call for 5 Mins Worked Fine.



Cons:

* Cannot use this with a Sim Card that has a Pin Enabled, Seems to cause it to Not find the Mobile Network, although still does get past the Sim Lock it will claim all Phone Functions that require your SIM card to be "Not Available".

* While it is Paper thin except the chip itself it can be a bit of a squeeze to fit it in the SIM slot.



Other Thoughts:

Checked the Sony Ericsson when in the handset with the Smartsim inside using the Sony Ericsson Service code
-> * <- <- * <- * then Service info then SIM lock it still does indeed say that the phone is locked (Network *Locked Padlock* 7).

Phone Tested on: Sony Ericsson W880i Firmware R8BE001 (Europe 4) - Latest as of writing this review.

Bottomline:

Does exactly what it claims with only 1 minor hiccup.
Worth the asking price and I may pick up another to keep around in-case the need arises.