Mag & STBEmu app
If you are seeing the blue screen saying "STB Blocked contact your provider" this is basically the default screen for every problem. I can guarantee, you will never be blocked.
What this really means is your device is unable to connect to the server. This will be down to you have lost internet connection, or the sub or test has expired. All subs and test run from the time and date of the email you received them in. Please refer to this.
If this isn't the case, in very rare circumstances the server may be down, you can check in news and updates.