About 3 months ago my little dribbled in my phone and it stopped working. I dried it off and it seemed to be fine apart from the power button. I took it to be repaired and thy replaced the power button which they said had corroded. When i turn it back on it says no service and that a sim card isn't inserted. The sim card works as i am using it in a different phone. The repair place says it can't be mended. Wifi works etc. Can this be repaired or would i be best selling it for parts?