Im getting weird phone calls late at night around 4?

Andy Mclovin asked:

for some reaosn i get late night ophone calls like around 4 and 5 in the morning somtims even in the day and on the caller ID it says BLOCKED CALL but i NEVER blocked any calls and i pick up the phone and i say hell and then you cna hear them hang up the phone.. so like what the hell is this??

Samsung CellPhone