The protest is going on from last three days in Iran, and many peoples have been sent to Jail for the rally. Social media is prevalent in the country. The instant messaging app - Telegram is the most popular app in Iran and used by more than half of country population.
Pavel Durov, Founder & CEO of Telegram, tweeted saying “Iranian authorities are blocking access to Telegram for the majority of Iranians after our public refusal to shut down t.me/sedaiemardom and other peacefully protesting channels.” You can still access these apps using VPN services but if there is the whole internet is blocked, so these services are also waste.
These are many VPN services to use, and you can use them according to your needs. Most of the VPN services are paid services.