Earlier we dynamically swapped out the hardware driver BLOB of the HG612 . We tested a new BLOB using an ADSL2+ line and found little to no performance gain between the two BLOBs.
Today, however, we tested again, using firmware built by Hungarian hacker, Csaba Sipos.
This time we tested the latest BLOBs with VDSL2 Annex A and Annex B.
The testing equipment was a Huawei HG612 Revision 3B and a Huawei MA5616 DSLAM with V800R310C00 firmware.  The linecard was a H835VDSH 24-port VDSL2 card, with all but one subscriber port deactivated (i.e. no issues of crosstalk.)
The Central Office DSLAM equipment was configured for the G.993.2 Profile 17a.
The VDSL2 PSD class mask was Annex B Plan 998 ADE17-M2x-A (Band Plan B8-11). That is the class mask specified in BT SIN 498 Iss. 4.3 (Jan. 2013). See. 
Upstream band US0 was utilised dynamically.
In contrast to earlier tests, the subscriber port was de-activated between each test allowing the linecard chipset to be reset:
MA5616(config-if-vdsl-0/4)#deactivate 0 MA5616(config-if-vdsl-0/4)#chipset reset 0 Note: Please don't operating on port while chipset resetting, are you sure to continue? (y/n)[n]:y MA5616(config-if-vdsl-0/4)#activate 0 template-index 2
The findings are as follows:
Under controlled conditions with no line noise and measured levels of line attenuation, the newest CPE hardware BLOB (A2pv6C035m.d22g) consistently outperforms the original BLOB (A2pv6C030b.d22g).
A third VDSL2 modem, the ECI Arcadyan VG3503J Revision /r, was used as a control.
The newer BLOB achieves maximum attainable rates which are statistically higher than the rates obtained with the original BLOB.
An (updated) firmware image for the HG612, containing the newest hardware driver BLOB (A2pv6C035m) can be obtained from .
Flashing the modem with this new firmware image involves the same procedure as documented earlier.