As of my last update in September 2021, 4PDA is a popular Russian-language mobile forum community that covers a wide range of topics related to smartphones, gadgets, applications, and technology. To prevent spam and bot activity on the forum, 4PDA employs CAPTCHA challenges during registration or certain actions. A CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a security measure used to ensure that actions are performed by real humans and not automated bots.
Remember that CAPTCHAs are designed to be easy for humans to solve but difficult for automated bots. They often contain distorted characters or images that can be challenging for computer programs to interpret accurately. Once you enter the correct characters and pass the CAPTCHA challenge, you should be able to continue with your desired action on the 4PDA forum.