I have had my nexus 4, purchaced on tab over a year ago. Recently, it underwent an "upgrade" to lollipop and effectively turned my once top knotch phone into a total pos. It shuts down randomly, freezes up like my old nexus s under the simplest of multi tasks. And generally struggles with everyday calling and texting. I want my old phone back!!! Is there anything I can do? Please help me koodo. Thanks, Andrew. Ps, I can't afford another new phone!!!!!