I just received my T-Mobile Pearl to replace my existing Nextel 7510 Blackberry. I feel like I've just entered a new millenium - thanks to both the Pearl technology and t-mobile service and customer support. Within 5 minutes I was able to move my old Nextel phone # onto the Pearl by calling customer service and speaking to a live person who knew what they were doing! I can't remember the last time I experienced that with Nextel and I've been a Nextel customer for at least 6 years. Everything was easy from setup, customizing, adding email onto the phone etc. And for the 1st time, I was able to send and receive calls from a cell phone inside my brick house. T-Mobile told me in advance that it was very likely that I wouldn't be able to, especially since I live near the Long Island sound and the t-mobile coverage map shows 1-2 bars of service - but it works great - crystal clear.Having been a Blackberry user for the past several years, the Pearl is a huge leap forward in all aspects.I definitely recommend this phone and T-Mobile!