I would definitely open up a support ticket. Dropped calls and echoing issues are not typically caused by the end users network setup. Since you've tried the ATA on different ISP's with the same result, this tends to point to an ATA problem or carrier issue. In either case, Voipo is responsible for both. I would log into vPanel and go to the Call History log, and try to gather as many of the call reference numbers associated with these dropped / echoed calls. I would paste these call reference logs into the email support ticket for their analysis. It will help them determine whether it's being caused by the ATA or a carrier, or possibly both......