I have an iPhone 5 (unlocked from Apple Store, non AWS/T-Mobile version) that I use on T-Mobile thanks to LTE coverage becoming more prevalent in Los Angeles. I also have an iPad mini (first gen).
Both devices are jailbroken on iOS 6 by myself and have flashed many Android phones so I'm no stranger to the process, but I'm curious about iOS 7 and want to upgrade.
I pay for Grooveshark so that I can use their mobile app (was grandfathered in and still only pay $3/month) but this app is only available in Cydia. I use this app nearly everyday on my iPhone during my long commute but they recently redid their browser version so that non-jailbroken users can use safari (and hopefully chrome too, haven't tried). On Android, it's not available in the Google store but unsigned apps are easily installed without requiring root, as you probably know.
Now I initially jailbroke the iPhone for all the little tweaks and settings so that it is as easy to change settings as it is on my Android phone but now with iOS 7 it seems like a few of the features now come standard and no longer need a jailbreak. Quick settings in the notification center is a big deal for me as well as KillAll processes. I even bought Nitrous to speed up browsing (not noticeable now, by the way).
I don't use the iPad mini nearly as much as the iPhone and generally leave it at home but will be going on vacation soon and may bring it along.
I decided I want to test it out on one device and leave the other with iOS 6 jailbreak.
I'm leaning towards updating the iPhone 5 to iOS 7 and leaving the iPad mini with jailbreak but can't really decide. Anyone have a similar experience with multiple iDevices and jailbreak?
Also, if I do decide to trade up my device for the newer version (iPhone 5 to 5s or iPad mini to the retina version) which OS would have more resale value?