BT ships a variety of modems for its VDSL/Infinity product. There are ongoing discussions regarding the merits of each, but what all do have in common is that they are locked-down and inaccessible. The Huawei HG612 is theoretically the easiest to root, as described.The ECI B-FOCuS V-2FUb/I Rev. 1B can be unlocked via a serial connection without any need to replace the stock firmware.
internal clips by removing the screws beneath the two rubber feet and then prising the case apart, starting with the rear corners and then moving to the smallest clip – above the ethernet ports. That made freeing the sides easier, and then the remainder of the lid could be released.
The pin-out mentioned at the above link appear correct: pin 2 is TXD, pin is 3 RXD and (unlabelled) pin 4 is GND. The TXD pin on the PCB must connect to the RXD pin on the UART/USB adapter, and the RXD pin on the PCB must connect to the TXD pin on the adapter.
