Not receiving sms verification code

[Sylv26uk]

I used to receive it but suddenly stopped receiving the code for few application any idea what to do on iphone?

[MI5]

@Sylv26uk 

Try these tips Guide: Text Message Tips (not sent or received) 

[madasaf1sh]

@Sylv26uk

Sometimes there are issues with the SMS providers that these companies use. Unfortunately SMS like email is not guaranteed to be delivered.

I would start with contacting the sender directly.

[Sylv26uk]

Nothing to do with the iphone itself in settings ? Does O2 block some sender ?

[Sylv26uk]

Anything to do with premium-rate bar?

[MI5 · Accepted solution]

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@Sylv26uk wrote:
Anything to do with premium-rate bar?

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It has been known for a zero spend cap to prevent shortcodes from being received.

Changing to a £5 spend cap can fix it.

[Sylv26uk]

How to change it ?

[MI5]

@Sylv26uk 

You'll need to call customer service.
Numbers here Guide: Coronavirus Community Help and Support 
Or advice from an O2 Guru regarding a way to get through:
If you call 202, when it comes to the reason you are calling stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Say "Upgrade", "Lost/Stolen" or "Fraud" if you have to, to get put through to someone.

[Sylv26uk]

Does O2 block any numbers if you receive too many time code from a sender ?

[MI5]

No they don't