No Dial Tone

I’ve been using Ooma for 9 months and everything was working well. Just the other day, I lost dial tone and cannot make phone calls. I’ve rebooted both my router and the Ooma Teleo, but still no dial tone and cannot make calls. Ooma sent me a replacement Teleo, but it didn’t solve the problem. The Ooma light is blue and I can retrieve voice mails. My wifi works on my computer and TV. Ooma is sending me another Teleo to try…

Any ideas why I lost dial tone and can no longer make calls?

Do you have just one phone connected? Have you tried another phone?