I was quite thrilled when I got this unlocked walkman phone. Its' voice call quality is great,music is simply awesome with the stereo headsets that come with the phone, and the phone's battery life is phenomenal. However, the phone drops way too many calls when I am in my apartment. I am with T-mobile and admiteddly, T-mobile coverage here isn't as great as those of other service providers. Nonetheless, my previous phones with T-mobile didn't drop calls whatsoever. But with this phone, I can barely be on a call for 5 minutes.T-Mobile doesn't officially carry this phone, and so help from that quarter wasn't forthcoming. Sony Ericcson webpage doesn't seem to have any software upgrades.Overall , it's an amazing phone,but with such high percentage of dropped calls, I would not recommend this productRam