I need some help. After the OTA update to 4.3 on my Nexus 4, my phone will not connect to my PC. It will still charge after connecting to any USB port on my computer but not connect. I've tried different cables and different computers and still nothing. I had no problems connecting prior to 4.3. I've searched various forums and tried various methods. This includes having the phone in developer mode and enabling "USB debugging", switching from PTP to MTP and vice versa, trying to locate drivers on the internet, and downloading the SDK manager. I've never rooted my phone before and want to to enable the LTE radios which requires rooting as well as connecting to my computer. Any suggestions?