Thanks for the quick response.
As Talkatone works on the phone the Adam one Solution would not work. I did a pihole -t | Grep <phones's IP> .and have captured the requests from the phone. Will try to open each one and see if that sorts the issue. .
Here is the list. Not sure if these are related to Just Talkatone or some other apps trying to access the Net in the background at the same time.
i.l.inmobicdn.net
cdn.doubleverify.com
wv.inner-active.mobi
c.tpbid.com
gotu.tpbid.com
ets-us-east-1.track.smaato.net
impression.link
pagead2.googleadservices.com
geo.moatads.com
mb.moatads.com
ho9x5gcmuvfcbnx9qrwvjrmalksin1640746655.darnuid.imrworldwide.com
stat.flashtalking.com
ade.googlesyndication.com
www.google.com
cdn.liftoff.io
mug.criteo.com
12/31/2021 - UPDATE: Haven't been able to find the culprit from the above list yet....