You may want to check the battery again, and make sure that the contacts on the battery are in contact with the contacts in the phone. Also make sure that the battery does not have a paper or plastic shipping cover over the contacts.
Some thin batteries can be out in backwards and still fit so that the cover can be put on the phone.
If the battery is in the phone properly, and the phone is working as it should, you should at least see the battery charging bars on the right side of the phone's screen.
It's possible that either the phone or the battery could be DOA, only way to really find out is to go to a store that sells your phone (hopefully one that your cellular provider runs), that way they can change out the battery and or phone if they are dead.