If you don’t have the original box of the DEAD V3 cam, which has the MAC ID in the QR code sticker on box. I save the original boxes until the 1 year warranty is up just in case I have to send back.
The base on the V3 was designed to be removed to use alternative mounts, and the QR code and MAC ID is on the detachable base.
So if you don’t have the original box you could swap the detachable base and then the newly ordered Amazon V3 cam has same matching QR code and information when returned in that same box.
If the camera is truly DEAD then chances of the internal MAC ID being read are slim, but before sending it back have you tried flashing latest firmware via Micro-SD card?
Or is the camera beyond the ability to be flashed?
QR & Barcodes obfuscated and full MAC ID not shown in image below, for privacy.
Use Google Lens to read your QR code on camera or box if interested…
If you have not tried to flash the V3 manually via the Micro-SD card you should try that first.
Link to flashing instructions —> How to flash your Wyze Cam firmware manually
Before pulling off a SHAMazon Return…