suggestions for good android mobile phones

it is a good phone if available in your area it does not have a micro-SD slot though so its capacity to store items is limited to internal storage
https://www.gsmarena.com/xiaomi_redmi_k20_pro_mi_9t_pro-review-1973p6.php

pixel 3a is costly in india...
in us its cheaper..
i am waiting for k30 pro that should get released in a month.

but it will be nearly same price as  one plus 7.
any idea about compairson between these two phones.. ?
k20/ upcoming k30 with one plus 7..
i feel one plus is more popular

I've only had experience with Nexus/Pixel, Samsung, and Motorola Android phones and they have all provided a good experience. I prefer the Pixel phones because they run on vanilla Android without any additional software from the phone manufacturers, so its less finnicky in my mind.

For your comparison between the Xiaomi and OnePlus phones, I've read reviews about Xiaomi that are positive but don't know anyone who has owned one. I've had friends who have owned OnePlus phones and they used them for 1-2 years and liked them and did not have any issues. I actually have a friend who might go from a Pixel 3a to a newer OnePlus phone based on his previous experience.

Looking at the specs, the OnePlus 7 is technically better on paper and should run more smoothly over long term use. If you have phone shops you can visit that have both phones that would probably help you a lot to see if there is anything with the physical dimensions of each phone that you prefer.

Samsung has moved out of China and will start manufacturing smartphones in India and you shall see many entry models of Android smartphones for India market very soon.

What are your usage and urgency to purchase?

Last July, Samsung announced that it would create the largest mobile phone factory in the world in Noida, India.

https://www.ft.com/content/4d8285a2-eff0-11e9-ad1e-4367d8281195