It's probably the biggest Android device launch so far, but one network isn't going to have the Sony Ericsson Xperia Play ready to go on the official launch date of April 1st.O2 has backed out of that launch date, with TechRadar saying that 'software bugs' that adversely affect the phone's performance are to blame. In a blog post confirming the delay, Stuart Hibberd, head of O2's testing team, said: 'We've been testing the phone non-stop for weeks and have found some bugs in the software that, if they're not fixed, means customers won't have a great experience.'He added: 'We've been working with Sony Ericsson to get these bugs ironed out, but haven't been able to get them fixed in time for us to be able to launch the phone on April 1st as we originally planned.'No new date has been put on the phone's launch on O2, leaving customers in 'no man's land' - not sure whether to wait or perhaps try another network. Vodafone, for example, announced its contract deal for the former PlayStation phone just last week and as far as we know, is still offering the phone from that 1st April date. Alternatively, Play.com is offering a sim-free model at the same time if you have upwards of £500 to spare.Which brings us to the conclusion that the bug involves the way the phone interacts with the O2 network and/or content. At least, that's what we hope. The last thing Sony Ericsson needs is a 'buggy' flagship phone going out on other networks this week.