So a friend of mine looks at 'particular video's' on his phone, and goes on 'particular sites'. He sent me an MMS of a screenshot of his phone. He uses an iPhone 5. I myself have a Nexus 4, and am wondering whether there's any chance of viruses being sent etc? i.e. from his phone to mine, because I looked at the pic he sent me. The pic was a screenshot of a text convo he had with me a while back.