Android Bulk SMS Sender simplifies mass messaging by enabling multiple SMS transmissions through various Android phones on a unified platform. Through a PC, it facilitates the transmission of thousands of SMS using connected Android devices. To establish a connection to Android Bulk SMS Sender, users must install the 'SMS Sender Modem Pro' App on their phones. Contacts can be imported from computer files (such as Excel or text files) or entered manually. The software allows unrestricted SMS sending to any number of recipients, including international numbers with the option to add country codes as prefixes.