First of all, I had used the at&t prepaid sim that has data package in it on my LG phone, then I got my new Samsung Pocket today, so I think I would use the same sim card on the new phone and let's see what would it be. In fact, when I used my LG phone, I had never been able to use internet anyway. I went to AT&T store and asked them whether my LG phone was compatible with AT&T data package or not. They said my LG was not compatible with its data package. Now I got my new phone, Samsung Pocket S5300. I wanted to know what was going to happen if I used the same sim card on my Samsung Pocket. The result was still the same; my Pocket still could not be able to use internet on this sim card, so I went to the store one more time to ask them what was wrong with my phone. However, this time it's not my old LG phone, it's a samsung pocket s5300 that is running on gingerbread 2.3.6. They said my phone was not bought at AT&T store, so it's not a registered phone. Therefore, It is impossible to use internet since my phone was bought form somewhere else other than AT&T store. They were right; I bought it from Amazon. Till now, I still haven't been able to use my internet on the phone even though I've had data package in the sim card. I also contacted directly to AT&T customer care personnel and had a conversation with him for an hour. He tried to help me at his best by telling me to reset APN and stuffs to get the internet to work, but the problem has still been unsolved. Finally, he said maybe my S5300 Pocket does not support 3g, so the only thing I can do was saying thank you to him. I can only use wifi hotspot so far, and it's not convenient for me at all. I just want to know if there is any way I can use internet on my phone on AT&T data package that I've had. Any exotic suggestions or ideas are welcome since every way I've tried is useless. Thank you.