Hi Lipe123,
You are right .. searching is MUCH better than making new duplicate posts ... but when responding to a 5 month old thread, it looks better if you ask if its still relevant first...
Telkom does not always do good stock rotation ... It could be the your router has been sitting on the shelf for some month, since the shops only replace when they run low on stock .. I could confirm that from the serial number if it important ... also, remember when these routers are ordered from the factory, there is also some lead time for manufacturing and shipping ... this means that we have a fairly long changeover time when there is a new firmware . As with any IT equipment, if you wish to always be be sure that you are on the latest firmware, then it best to keep checking the website. I normaly also try to make an anouncement on this forum, but don't always get there...
It is true that the previous version works with 0-9, and A-F .. it also works with some other combinations of letters which is why we did not notice it ( our "standard test keys" all worked, even though thay are not all Hex keys

) If you are faced with a previous firmware, and cannot update for some reason, It is quite safe to try Heaxadecimal chars.
By the way .... 99.70.6 is comming soon .. not 100% ready yet though ...
2c Telecoms