[Q] my phone was unrooted
I rooted my phone a while back and installed CWM recovery. I flashed several Roms successfuly. However when I installed my new ROM( currently omnirom) the supersu app is no longer there. I wanted to try titanium backup but when I installed it, it says I don't have root access. I redownloaded the supersu app and the install keeps failing. So I have a few questions.
1. How did I lose root access to my phone?
2. Can I install custom Roms without root access?
3. What steps should I take to regain root access?
BTW my phone model is galaxy s3 i9300 model.