Buddy of mine rooted his EVO 4G and added tethering app. He showed me how I could connect my Samsung Captivate to his EVO via Wifi and surf using his cell (3G) connection. To my knowledge, he was connected using only 3G (no 4G signal there). However, page loads were MUCH faster on my phone when tethered to his phone than when I use my own AT&T 3G connection. Why so much faster??