I am very disappointed that O2 have not implemented sms over WiFi Calling to date. There have been questions here about this feature for around three years with promises, promises...
I get weekly requests from my bank, the government and many other oranisations requesting me to type in a number from a text they have sent me to enable me access their services. Life is becoming very difficult without this feature.
If persons here are having the same issues can I ask you to complain to O2, the more complaints the better. After all if EE and Three can do it why not O2. Users on Vodafone are in a similar situation.
Track usage, upgrade and get support with the My O2 appDownload My O2