I've looked up the specs for the 830 extensively but the reason I ask is because the size of the 830 scares me a bit. I'm not a fan of enormous smartphones. I'm upgrading from a blackberry bold so that's why I want a size efficient phone. However can you guys tell me if the the 635 is powered low enough for me to ignore the bigger size of the 830? Is the 635 not even worth it anymore and will it keep up with the recent and future windows OS updates?