I bought a Cubot Max a while ago and have held off recommending it because I thought it might fail. Here's an Amazon link:
Cubot Max 6.0 inch 4G LTE Smartphone Unlocked, MT6753: Amazon.co.uk: Electronics I know Amazon is evil but for a weird brand smartphone it's probably better to go somewhere that will actually refund you if it doesn't show up or whatever. I got it from there for half the price but it's still only about £125 most places.
My only complaint is the camera, which is not great. Bleaches out reds and has a jumpy zoom. TBH I've found this less of an issue than I expected.
Otherwise the battery life is excellent and I use it a LOT. This is partly because it comes with a battery twice as big as average and partly because it has no bloatware and allows you to put most things on the very large memory card you can put in.
Two Sim slots - useful when we were on holiday.
Runs everything you can think of.
Size (phablet size) is actually quite easy even for my tiny arthritic hands. Actually in many ways it's easier because there's less gripping - it just kind of sits in your hand. When I hold a smaller phone I have to grip more and usually drop it.
Good enough screen resolution for videos. Good screen size for that too.
Very good resistance to being dropped, drooled on (by the baby), etc, and the charging point is still fine after several months, which is one of my concerns with cheap phones.
Works with any sim.
I'm intending on buying one for my daughter when her birthday comes around.
The battery life is terrible - literally goes down 1‰ every few minutes even when all apps are closed - and you can't move any apps to the SD card. There is theoretically an option to use My SD card as "adoptable" internal storage, but that's not possible since it's over 32gig and I don't particularly want to delete everything on my SD card when hardly any apps work with adoptable storage anyway. 
