In this command there is something wrong. Im using motorola c118. Command : ./osmocon -m c123xor -p /dev/ttyUSB1 -s /tmp/osmocom l2 -c target/firmware/board/compal_e88/trx.highram.bin Received PROMPT2 from phone, starting download handle_write(): 39 bytes (39/39) handle_write(): finished got 1 bytes from modem, data looks like: 1b . got 1 bytes from modem, data looks like: f6 . got 1 bytes from modem, data looks like: 02 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 41 A got 1 bytes from modem, data looks like: 03 . got 1 bytes from modem, data looks like: 42 B Received DOWNLOAD ACK from phone, your code is running now! Enabled Compal ramloader -> Calypso romloader chainloading mode Received ident ack from phone, sending parameter sequence opening file: No such file or directory what was the problem ?