My month old portal has developed an annoying habit of crashing for no obvious reason. Screen goes completely black and none of the buttons respond. Only fix seems to be removing the battery and reassembling the phone. I'm using an up-to-date (2.1 Android) 3 branded PAYG phone on a 3 contract (contract phone was a Nokia X6, which also kept crashing; but you learn to expect that from Nokias). So far it's crashed once on my bedside table with everything apart from the alarm turned off, once in my pocket, and just now while downloading a podcast over wifi. In each case i've removed and replaced battery and phone starts up again. Anyone else have a similar issue?