Is installing a custom ROM safe?

Related questions

1. What is meant by stock Android version?
2. Can you install a custom ROM without rooting?
3. What is Aosp extended ROM?
4. Is Resurrection Remix AOSP based?
5. Do I need root to install lineage OS?
6. Is Aosp a stock Android?
7. Which is more secure Android or iOS?
8. Is it safe to install custom ROM?
9. What is treble GSI?
10. Is root required for custom ROM?

Tags

1. #virus
2. #without
3. #there
4. #custom
5. #bricking
6. #general
7. #issues
8. #least
9. #install
10. #warranty
11. #device
12. #about
13. #always
14. #violating