In addition to unveiling three new Windows Phone Mango devices today, AT&T announced that it will offer a new $25-per-month GoPhone prepaid plan. The plan includes 250 nationwide voice minutes and unlimited nationwide messaging every 30 days, and launches on September 18. On that day, the carrier will also offer GoPhone customers a new international long-distance calling feature that gives …

If you weren’t too sure about Windows Phone 7 as an operating system, maybe these two new Samsung handsets will help sway you. The Samsung Focus S is a heavyweight contender, boasting a huge 4.3-inch screen, and a super-quick 1.4GHz processor. And that 4.3-incher? It’s a Super AMOLED, the likes of which we’re expecting on the Google Nexus Prime. On …

Welcome to the 411, my column answering all your questions about cell phones and cell phone accessories. I receive plenty of questions about these subjects via e-mail, so I figured many of you might have similar queries, too. At times, I might solicit answers from readers if I’m stumped. Send your questions and comments to me at nicole.lee@cnet.com. If you …