Bad news for apple and electroneum fan 
http://www.businessinsider.fr/us/apple-bans-cryptocurrency-mining-on-iphones-2018-6
It has actually not bad news, instead.http://www.businessinsider.fr/us/apple-bans-cryptocurrency-mining-on-iphones-2018-6
I don't support the idea to mine cryptocurrencies on smartphones, which is easily to destroy your phones.
In addition, mining like this is likely un-profitable approach.
ETN isn't really mined on the phones. Here is an article on how it works:
https://electroneum101.com/how-to-mine-electroneum-with-a-mobile-phone/