If you do not know the name of your intended recipient's mobile carrier, there are several free websites that not only return the service provider but also its corresponding SMS and MMS Gateway addresses.
Ọ bụrụ na ị maghị aha onye na-ebugharị onye na-ebugharị ya, ị nwere ọtụtụ ebe nrụọrụ weebụ na-enweghị ike ịnyeghachi onye na-ahụ maka ọrụ kamakwa akwụkwọ SMS na MMS Gateway adreesị ya.