The Lumia 635 is almost identical to the 630, but with the key addition on an LTE radio. While the 630 didn't rise above what Nokia had already achieved with previous budget handsets, the 635 is a much more welcome addition to the range. The only other affordable, 4G device Nokia has to offer is the Lumia 625, launched last year. The handset had a number of flaws -- particularly its large, low-resolution display -- and only just crept into an acceptable price range. It was a missed opportunity after the highly regarded 620 had earned Nokia some cred, and the better-executed Lumia 635 is a great example of what the 625 should have been.