Checking data remaining without app

[Any1else]

I am the account holder and have my sons phone on my O2 app.

Is there anyway that he can check his data usage/remaining Gb without the app? He used to be on EE and he could click on a website link to see his data remaining. Wondered if O2 had that functionality?

[pgn]

Best way is to set the data on the phone's own controls and use that, @Any1else 

https://www.samsung.com/uk/support/mobile-devices/how-do-i-check-data-usage-on-my-samsung-galaxy-dev...

Samsung example for illustration.

[MI5]

@Any1else 

O2 have a web version too but it requires the login details for the account.

https://mymobile.o2.co.uk/

[Any1else]

Thanks @pgn I know you can do that but he isnt Android and I dont think the ios version is accurate.

@MI5I dont want to give him the details of the account just to check his data usage.

[MI5]

@Any1else 

No other way with O2 unfortunately.