Re: Why did you get them a smart phone?
In olden days there were payphones aplenty which a young person could retain 20p for an emergenct call but with the disappearance of those that's not such an option. I was thinking of going "dumb phone" for my son as all it was needed for was a text message or two.
However my other half bought a cheapo Huawei on a low cost tariff (£5 per month) which managed to straddle both worlds - introducing the ability for son to watch youtube videos on a eye-wateringly tiny screen while at the same time having insufficient memory to reliably sync his school's emails.
And since a better phone was needed for those emails etc and to store some music on it, he now has a Moto 6 which makes watching youtube really easy.