I have been using this phone for a few months now and I noticed about a day after I got it a static sound when talking on the phone

Then a few weeks later I lost all sound

Got mostly painless refunds for the first two that did NOT work.#1 from Kanga Supply - bad speaker/ringer and crashed.#2 from Kanga Supply - bad mic - no sound in calls or in videos taken, vividly noticeable burn in around the softkeys.#3 from Tech Venture - 9.5/10 quality and seems to be fully functional.