For some reason though, the Model # under the battery says 5160i but i searched for that model and it isnt even listed in Nokia's database... but the 5165 model is identical so i figured this is it.

Internal Antenna. Doesn't snap off (like my Nokia 5165) or stick into your leg when you sit down. - Nokia operating system. IMO the best. I got this phone as an upgrade from my Nokia 5165.