I actually like the BT supplied Huawei HG612 modem. It seems to do a very good job.
It's just a shame it isn't supplied already unlocked.
It even says it supports "Advanced Management via HTTP, TR-069" on its original packaging box.
I'll be honest, BE, I've never seen any literature concerning why they're 'Locked down'. I've seen recent documentation though, stating the EU can replace the actual modem for their own kit with the caveat that if a fault should arise, OR would request that the original modem be connected for testing purposes.
That's very interesting & kinda contradicts what ISPs are still saying.
Is that "official" documentation, available for public circulation?
For now the ECI modem, although unlockable, isn't as user-friendly in divulging BT's jucy secrets.
Other VDSL2 modems (often with a router combined) seem to be reasonably O.K., but are still (in the main) rather expensive.