Yes he is on iOS 5.1 on AT&T- he DOES NOT receive faster speeds.
It's just AT&T's fake 4G (HSPA). Here for better explanation:
https://forums.macrumors.com/posts/14774537/
Lucky dude, I heard there were certain users who received a 4G upgrade with 5.1. It was based on when your iPhone was produced I think.
The 5mbps I get on my 3G iPhone 4 is consistently better performance than I see on Sprint WiiMax phones.No. Not at all. Every iPhone 4S is the same.
AT&T and T-Mobile call their HSPA+ network "4G" but in reality it's just a faster 3G system. AT&T and T-Mobile did this because Sprint and Verizon already had actual legit 4G (WiMax and LTE Respectively). There is no 4G iPhone or any iPhone that supports 4G.
No. Not at all. Every iPhone 4S is the same.
AT&T and T-Mobile call their HSPA+ network "4G" but in reality it's just a faster 3G system. AT&T and T-Mobile did this because Sprint and Verizon already had actual legit 4G (WiMax and LTE Respectively). There is no 4G iPhone or any iPhone that supports 4G.
No. Not at all. Every iPhone 4S is the same.
AT&T and T-Mobile call their HSPA+ network "4G" but in reality it's just a faster 3G system. AT&T and T-Mobile did this because Sprint and Verizon already had actual legit 4G (WiMax and LTE Respectively). There is no 4G iPhone or any iPhone that supports 4G.