I bought a factory unlocked device from Verizon and tried a AT&T carrier to check the network connection. It worked fine but from then I am seeing a AT&T logo when I switch off/on the device and not receiving any OTA updates as well. I am currently living in India and couldn't find a way to update my device. Last update happened in Aug 2019 and still running on Android 9. Can someone please help me find a way to update my device. Appreciate your help!
@Ehsank I tried Smart Switch but it says software is upto date. And I visiter the Service centre and they confirmed its not possible to update out if country device.
