Methods and systems for top-up are provided. A representative telecommunication messaging and real-time replenishment (TMRTR) system includes a user interface that receives a user input and transmits the user input that includes chat message and a recipient phone number associated with a phone user's account; and a real-time replenishment (RTR) gateway that receives and transmits chat messages and the phone number from the user interface and requests for a telephone service company associated with the phone number to a home location register (HLR) look up service. The RTR gateway tops up phone minutes and/or balance of money of the phone user's account associated with the phone number based on the phone number of the received user input, and the determined telephone service company from the HLR look up service.