/** ******************************
 * Macau mobile phone number *
 *********************************/
/**
 * starts with 6
 * news: https://en.wikipedia.org/wiki/Telephone_numbers_in_Macau
 * */
export declare function is_mo_mobile_phone_prefix(tel: string): boolean;
/**
 * with/without +853 prefix
 */
export declare function is_mo_mobile_phone(tel: number | string): boolean;
/**
 * very forgiving
 *
 * @return +853xxxxyyyy if valid
 *         empty string if not valid
 * */
export declare function to_full_mo_mobile_phone(tel: string | number): string;
/**
 * @returns +853 xxxx yyyy if valid
 */
export declare function format_mo_mobile_phone(tel: string | number): string;