Install o2 sim into unlocked phone

[C7572]

I've installed a current pay monthly sim into a new unlocked phone ,but can't access data 

[Enlli]

Sounds like the APN settings need checking

Android = https://community.o2.co.uk/t5/Android-Devices-Samsung-HTC-Sony/Connecting-Android-Phone-to-Data-Serv...

iPhone = https://community.o2.co.uk/t5/Apple-iOS-Devices-iPhone-iPad/Connecting-iPhone-to-Data-Services/m-p/5...

[Cleoriff]

@C7572 

We're just customers like you but it sounds as if you need someone to access your account which can't be done from here

Give O2 a call on  202 or 0344 809 202 (Contract)  4445 or 0344 809 222 (PAYG)

Or you can message O2 on social media on Instagram https://o2uk.co/O2CIG), Facebook ( https://o2uk.co/O2CFB) , Twitter ( https://o2uk.co/O2CTW). 

[Oxonian]

@C7572 

Did the APN suggestion provided by @Enlli solve your problem ? 

If it didn't, it can be a good idea to ty a different SIM in the handset, and to try the SIM in a different 'phone. You could also try a PAYG SIM from another network in your handset. 

That will help to isolate whether it is a SIM problem, a network problem or a handset problem.