Hi can anyone please suggest a cheap ebook reader or phone that can work as a reader?

I used an AMOLED phone before this as a dedicated reader and it was great because I read a lot at night. The black background really helps with eyestrain at night. But it is having a lot of random restarts lately and I think it is probably time to get a new reader. The phone is >5 years old.

How is the Kindlewhite when it comes to reading in near complete darkness?

Most likely I will look for another cheap AMOLED phone. LCD screens are ok but not so good at night. But how does the Kindlewhite or other e-ink readers fare at night? Especially those with built in lights?

Thanks everyone, I am going to stick with an AMOLED screen because of the night reading.