Part of the reason can be attributed to the curvacious backs that offer a more natural feel, Another factor to the phones' overall comfort was the somewhat gritty plasticbattery cover, which kept nasty fingerprints away and still made the devices feel like they'll be able to hold up well over time.
And, behind the richly colored plastic lies a battery capable of up to 37 days on standby, something smartphones could only dream of, and perfect for places where power isn't abundant.