Im getting the Curve 8900, and wondering how the durability is? I dont treat my phones poorly, but it will be in my pocket all day with keys and pens/pencils and stuff like that. Is it a durable phone, or will it break? I'm also going to buy some sort of case (hopefully hard case) for it when i get it, but if it cant deal with the typical abuse of days in a pocket i may go with something else.