I had a Samsung T639 phone but some "animal" stole it. I wanted to get the same model at the Tmobile store but most of the stores do not carry that model anymore. They claim to have a Samsung 339 that is similar. I do not need any fancy things or features. All I do is use the phone, speakerphone and camera. How does the T339 compare to the T 639? I also have cords for the car charger and photograph uploader to computer cords. Are these cords interchangeable?