How to check balance from non-O2 phone

[Minxy]

My 97 year old Mum has an O2 classic sim in her phone, obviously she has the phone not me.  The sim is registered in my name as I got it for her and topped it up originally. 

As she's in a care home some miles away from me I'm trying to find out if there is a way to check the balance so that if necessary I can top-up without physically having her phone as she gets very 'twitchy' if anyone so much as looks at, never mind touches, her phone! LOL

When she had a Three sim I could simply do an online chat with them, confirming my account info that way, and they'd then give me the info, however I can't find anyway to do this with O2, can anyone suggest how this can be done please.

[MI5 · Accepted solution]

@Minxy 

Call 0344 8090222 for PAYG customer services.

[Minxy]

Thanks, I'll do that tomorrow, shame there's no other way to do it though as I suspect I'll end up hanging on the phone for ages.

[MI5]

@Minxy 

You could access her MyO2 online but it would need you to have access to the phone to set it up in the first place.

[Minxy]

... and risk the wrath of Mother for daring to touch her phone .... 😮

Being serious, as I mentioned I have already registered the sim in my name but they send a text to enable log in which is the issue as she'll receive it not me.

[MI5]

@Minxy 

Yes, fully understand, hence the caveat I mentioned previously.

Hopefully customer services will help you with the info you require 👍