Nice Phone

The 640 seems to be a nice place to stop between the 521 and the 900's. It's big, but not too big and has many, many options for slim but solid protective cases, which I usually apply immediately. It can take plenty of memory on an SD card. The battery lasts the whole day if I use the phone a lot, and several-to-many days if I don't. It's brighter than the 521, better sound, more speakers. It has the usual Windows Phone issues, but so do the higher end, newer models, and it seems to have fewer bugs. Didn't like it with Windows 10, downgraded back to 8.1. Maybe Win10 when it's all polished and fixed... or maybe not. Decent camera, though for some reason, this model doesn't have the camera button on the outside, which is disappointing, but it does have many built-in fun things for photography. My phone was originally meant to be an AT&T GoPhone, with bloatware included. It's hard to get rid of the bloatware, since it keeps sending upgrades to applications I've already deleted, but since this doesn't affect the battery life the way it did in my 920, I just ignore it between occasional mass deletions. I like how it hooks up with my computer and talks to my iphone-- had trouble doing that both with my 521 and 920. Despite these and a few other annoying things mostly to do with Windows Phone, I like this phone, and have given it as gifts to family, as well.Read full review

Verified purchase: Yes | Condition: New