Virgin Mobiles new build-your-own smartphone plans may be seen as convenient by many consumers, but they also represent the most glaring net neutrality foul weve seen come from a US carrier. Starting next month, Virgin customers will be able to piece together a completely personalized plan — plans that could potentially turn social networks like Facebook and Twitter into line items on your monthly bill. Because with Virgins new approach, youre no longer just paying for voice, texts, and a bucket of data. The Virgin Mobile Custom plans, launching exclusively at Walmart on August 9th, let you pay separate fees for things like unlimited social networking and unlimited music streaming.