Basically I was quite new to jailbreak but I managed to do it for 9.3.3. I played Pokemon go a lot but they released an update which stopped jailbreak users from playing so me being me thinking I'm smart I thought I would fully reset my phone. Now, the app I had to use in order to open Cydia is deleted and I don't think I can get it back, and Cydia stays on my phone even if I fully reset it. I really need a way to fix this since I cannot update to iOS 10 and I want to. Please help!