on 15-02-2018 17:32
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
21-06-2019 21:46 - edited 21-06-2019 21:59
it would be useful if O2 added this because SMS messages are often used for 2FA on many online services and mobile applications to fully login. If you are out of mobile coverage, but on Wi-Fi with full internet, you currently can't login to those services because O2 do not send the SMS over WiFi like the other networks do!
Update: o2 customer services said it is definately a feature that will be added eventually, but no commited timeframe at the moment. Hope this helps.