Granmanh, There is a difference between
transferring a phone number and
porting a phone number.
With SOME of the Tracfones, you can easily
transfer your phone number to another model. It depends on which
type of phone you get: CDMA or GSM (with the SIM card.)
If you read some of the pages on that link for the tutorials, you can see that most of the CDMA phones transfer the numbers easily.
However, the SIM card phones for Tracfones are trickier. This is because with Tracfones, once you activate a SIM card, that particular SIM card becomes permanently dedicated to ONE phone number. Unlike CDMA phones, where you can easily change phone numbers on the same phone, you need to get a fresh, new SIM card, in order to change the phone number.
(The SIM cards are free and easily obtainable by calling Customer Service at Tracfone.)
When I say
activating, I mean registering the phone with Tracfone and getting service and a phone number, not simply turning on the phone and seeing if all the features work.
According to that tutorial, this is why if you get a new GSM phone, you do NOT want to activate it first, because you will receive a new phone number (dedicated to that SIM card) upon activation. You won't be able to
transfer your old number with the two particular phones you have and want to get.
PORTING a phone number is totally different. It involves calling Customer Service. They have to manually extract a phone number. The number cannot be simply transferred by the Tracfone computer. It usually involves many steps and many days for the PORTING process to go through. And you would need a new unused SIM card for that, anyway, once they extract the phone number from wherever it was.
If you do NOT activate the new GSM Tracfone first, using up the dedicated SIM card, you will be easily able to transfer your phone number. I did it with my Motorola W376 and it went through in about 5 MINUTES! ( I wanted to get a camera phone finally, even if i have to pay for the extra units.)
There is a feature on the Motorola W376 that is tricky and you may accidentally use up all your Tracfone units if you aren't careful and accidentally press this button by mistake and don't realize it. The phone has limited web access to Tracfone's website. That button is right
above the SEND button you hit for placing a call. If you hit it by accident, it immediately deducts one unit, even if you try canceling. Many people at various forums complained about how easily it was to accidentally hit that button and lose precious Tracfone minutes.
There is a simpler, cheaper "Double Minutes for life" phone to get. And it won't have the problem of accidentally hitting the web button. It's at the
Walmart website. Third phone down. $9.88 + only $.97 shipping.
http://www.walmart.com/catalog/catalog.gsp?cat=232632
.
I was able to deactiviate my old phone and activate my new phone but I was unable to get my minutes transferred for some reason. We were never able to figure it out and I lost 100 minutes. My new phone did have all my service days carried over. 
Go figure! I probably wouldn't upgrade to another Tracfone - I'd get a different service before I'd try that again. The US phone number probably would have helped!
(The Bluetooth is only for a headset on this Tracfone.) You have to email any pictures from your Tracfone (using the text message feature.) It costs 1 unit to send the picture, then 1.5 units per how long the actual transfer takes. So, actually it costs about 3 units to send any pictures to your email, (which you can then send or upload to your computer.)
