Unable to bring up dial-pad in call (URGENT!)

[helios.comms]

It's occurred to me today that there are lots of call controls missing from the in-call screen. I'm not based on-site so can't quickly check but according to the manual, there is this button from where you can access transfer, hold etc. But it's missing from the original screenshot.



Not sure if makes any difference but these handsets are using a common phone license. And always have BTW and call controls were available in earlier firmware. It's a real flaw that you are unable to go back to an earlier firmware!