I had a problem with my Nexus 4, the FS got corrupted and wouldn't recognize any sim card, no amount of reset to factory defaults or flashing the rom would hel

I had a problem with my Nexus 4, the FS got corrupted and wouldn't recognize any sim card, no amount of reset to factory defaults or flashing the rom would help. I had one small hitch getting ahold of their support, you had to call. My cell is my only phone so calling them was problematic. I had to use a friend's phone to do it, but once I got past the gatekeeper, I just interacted with the techs via email. After some very simple troubleshooting they emailed me shipping labels whilst shipping me a new phone. I've never had a company ship me a replacement before they received the dud, that was quite refreshing.