Thank you iq180, but ECM keys only last a couple of days and the problem start over
Thats why im asking for a fresh new EMM key, so it will autoroll everytime ecm key changes.
I also have a similar stb like you, i have a gtmedia v8UHD and it worked fine on 3720tp, the problem is EMM keys are encrypted inside this stb so i cant use those EMM keys on my Dreambox 920 (enigma2 linux stb).
Yes I know what was done to the GTmedia receivers and why it was done, I had a hand in it my self, people were getting the EMM keys then posting them in the open or selling them on the net, it had to stop, but on the other hand you can still add your own EMM keys if you have them and extract ECM keys to use on other receivers, it's a win, win.