The MOST USEFUL subroutine in BASEBAND 4.1 firmware (WE HAVE A WINNER!!!)

ROM:A0257C48 sub_A0257C48                            ; CODE XREF: sub_A01D4A4A+6p
ROM:A0257C48                 PUSH    {R4,LR}
ROM:A0257C4A                 BL      nullsub_17
ROM:A0257C4E                 BL      nullsub_18
ROM:A0257C52                 BL      nullsub_19
ROM:A0257C56                 BL      loc_A007A49A
ROM:A0257C5A                 POP     {R4,PC}
ROM:A0257C5A ; End of function sub_A0257C48

ROM:A0102290 nullsub_17                              ; CODE XREF: sub_A0257C48+2p
ROM:A0102290                 BX      LR

ROM:A0102BA2 nullsub_18                              ; CODE XREF: sub_A0257C48+6p
ROM:A0102BA2                 BX      LR


ROM:A01030A6 nullsub_19                              ; CODE XREF: sub_A0257C48+Ap
ROM:A01030A6                 BX      LR