What exactly are you trying to background? You looking to just straight up keep something active permanently in the bam ground? I ask because r-plus, the dev of swipeshiftcarot, has a new tweak coming out called InfinityTask which will remove the stock Apple limit for 3rd party app background privileges. For example, if you are downloading a file with Dolphin or maybe downloading a podcast, well after the time limit expires (I think it's either 10 or 15 mins) the download will be terminated. With this new tweak, that limit is now removed. I'm looking forward to this tweak to say the least. Should be a really useful tweak for many people.