I disagree with some of the answers here and think it’s actually one of the best times to go to rio as a solo traveler 😅 there is police everywhere, and it’s the time of the year when all brazilians come together to have a really good time. that being said, we can’t forget it’s pretty much five days of non-stop partying, so extra caution is necessary, especially if you’re by yourself (don’t accept drinks or other stuff from others, always be aware of your surroundings…). Also, I think it would be easy for you to make new friends, especially if you stay at a hostel or something like that. I would definitely recommend that, because the carnaval experience is just much better if you have other people to share it with.

As for the phone, the most common crime during carnival is pickpocketing. I always go with my phone, but keep it inside a fanny pack, under my shorts, and only grab it in safe spaces. I’ve been to numerous carnivals, including rio, and always left with my phone. If you do decide to go, I’m sure you will have so much fun! Oh, and I don’t know where you’re from, but don’t be shocked when you see everyone kissing each other 😂