Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't buy this phone!

I have had my razr since January of this year. I loved the phone at first, it has great reception and clear sound. However a few months ago it started having problems charging. It says unauthorized charger...it is the one that came with the phone! I have to fight with it every night to charge and sometimes it doesn't. Luckily mine has pretty good battery life. The only time the battery dies quickly is when I am in an area that has no reception because the phone roams and searches for signal non-stop. Navigation is extremely slow; I push a button and wait a few seconds before the screen changes...SO annoying! I am getting a new phone this week, I have had enough.