Hope it's not too OT, my nexus 4 I bought 2 months ago stated making problems with with the charging port, and I want to replace it with the Nexus 5, should I go the Amex route, return protection, refund, and buy the GN5 myself? or should I call google about the problem in hopes they'll replace it with a GN5? Or will they just send me a refurb GN4?