I switched from a Treo 300 on Sprint to the 7135 on Verizon. I haven't noticed any difference in coverage areas. I thought Sprint's call quality/clarity was a little better than Verizon's but not by that much. I do miss my Sprint retention plan and Sprint's Vision network, which blows Express Network out of the water in terms of both value and connection speeds. But all in all, I am fairly happy with my decision. The 7135 is a great device and definitely makes up for what I lost by leaving Sprint.