Help and knowledge regarding blocked Iphone

Hello guys...
I am buying an old iPhone 5s from my friend who bought from someone
When I searched for his imei in various websites which check it for free I found that it is brought in UK and locked on o2 and is blacklisted in UK but when I checked for Canada and USA it told me as clean.
So I want to know is there any risk in buying it.
I plan to use it with a turbo/gavey sim
So please tell if there will be any issue after using it for while..
The phone is blacklisted in UK and I live in India
If you need imei then tell me