I'm sorry to hear you're getting No Dial Tone and unable to carry out the online test fully.
I'll be happy to help get this sorted for you.
I have carried out a line status check here and all looks fine. Are you still getting No dial Tone today? If so, let me know and I can help further. If you can also confirm if you have tested another handset or tested your handset in another line that would be great.
I look forward to hearing from you
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