on 25-11-2019 21:03
The only way is to put the sim in an O2 or unlocked phone.
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 26-11-2019 20:43
TP-Link routers generally have a sms page built in - Login to your router to send/receive messages.
Demo Emulators here https://www.tp-link.com/uk/support/emulator/