So I've had this phone for about a month and the one irritating thing about it is it keeps dropping the data connection. Sometimes its fine running 3 or 4g then in the same place it drops completely. Goes grey bars for 4 or 5 minutes then back up again. I'm in Dallas where Verizon is supposed to have a good 4g network. Its sporadic at best. Anyone else noticing this or do I have an issue with the phone?