I had the same problems. my nexus would work at my home on and off and when i went on vacation it was horrible. I got another sim, same thing happened. Got two replacement phones, same problem. Then they sent me razr maxx. The Maxx was perfect! long battery great reception everywhere I was. Then I did the ICS update and the reception went to hell, still was better then nexus but wasn't as great and the battery wasn't as great most likely due to looking for signal more often. Samsung and google need to get their act together! ICS isn't what was promised. Sure it you live in San Francisco where there are towers everywhere The NExus and ICS razr will work great! but I travel! F them!