i phone 3g to i phone 3gs or i phone 4

Don't buy a brand new iPhone 4 now. As the next iPhone is on the line, just wait for a few days, if you feel the new one is very expensive, you can still wait and go for the iPhone 4 after the next iPhone gets released, surely Apple will reduce the price of iPhone 4 after that.

Hi ckciasigurl :) The new iPhone, which is the iPhone 5, will be available soon. The release date of the iPhone 5 is on October 4, tomorrow. So it is better if you don't buy the iPhone 4. iPhone 5 will be better for sure. If you want to swap your phone, there are many electronics stores who has this feature. Just ask your local electronics stores if they have that feature. You will save big time. :)

buy a brand new one, THE "I-PHONE 5"! Release date should be near, just wait and buy it later on. i am sure your wait will pay off

Is it a must to stick to the same brand name forever? If you have the money then you have a number of great options in the market out there which are capable enough to compete with the i devices and can even knock them off. Take galaxy s2 as an example. U must be aware of the hardcore competition going on between the two biggest giants in the smartphone market. At last the choice is yours, you may wait for a newer i phone 5 then 6 then 7 and so on ....or you can consider other NON I manufacturers.LOL.:)