There are many services which can help you to get an excess at the website you want. You can have a look at how to Unblock Websites and apps on mobile by many different links. I mean, there are many articles about it and you can use them without difficulties
Depends on where you are. If you are trying to unblock sites from school I suggest not doing so, especially if you have a good tech. If you are trying to access blocked sites from home you need to use either a proxy site or disable whatever blocking system is being used.