First, I am new to Android. I purchased a used Verizon Droid 3. I bought an unlock code and installed it. it said was successful. When I install the sim from my old phone (PCMobile Canada)which uses HSPA (or UMTS) The phone does not work. I get time/Date. It looks like it is getting signal (4 bars). Do I have to root or flash the phone to get it to work? Is there some setting I have to change? I am not sure how to proceed! What am I doing wrong? I was under the impression that once it was unlocked, inserting a sim from another provider would work. Any help or tips appreciated.