I wan't to report a big missing option to developer team. I am using Meizu M2 Note with Flyme Os 5.1.11.0G and we cannot able to block unwanted custom( no coming phone information) advertisement Sms's without no phone number.These annoying Sms's has no phone number and coming with only a title and a text.I think this was a very very big problem that any phone company can able to solve until today.If the latest upcoming Os will able to solve this , this was awesome for all users..