Sellers often specify on their site if the device support FOTA updates, or not.

Two questions:

1. If the hardware is original and the software is original – why wouldn’t it support OTA updates?

2. After I received a phone – how can I immediately check if it supports OTA, without waiting for the next update?

Thanks!

Examples for phones:

With OTA:

https://www.aliexpress.com/item/Original-Xiaomi-Redmi-3S-Official-Global-Firmware-OTA-Upgrade-Octa-core-Mobile-Phone-Snapdragon-430-4100mAh/32697748798.html

Without:

https://www.aliexpress.com/item/Global-Version-Xiaomi-Mi-A1-MiA1-Mobile-Phone-4GB-RAM-64GB-ROM-Snapdragon-625-Octa-Core/32830253938.html

Scroll all the way down and look for this message:

Pls read me before you make order.  we will open the original box to check the phone and install Multi-language ROM and Google play store. Official rom will be prefered. if custom translation may does not cover all the menus. Not support OTA update.                    <--<---<------ We may update the ROM, so the OS version may different as the screenshots. 

P.S.

In local stores I noticed it mostly about whether the device was bought from an official distributor, or from a parallel distributor.