Calls break up when saying numbers

[Lisa3]

Has anyone experienced call breaking uo when trying to say numbers or a post code? 

Callers can hear me speak but starts to break up as soon as I start to say numbers 

[PeteG]

Hello, Lisa. 

Welcome to the Three Community. 

To confirm, you only experience breaking up on the call while saying number and postcodes, but anything else within the conversation sounds clear? 

Pete. 

[Lisa3]

Hi yes only with numbers or numbers from a post code it's very strange but also very annoying 

[PeteG]

That's quite strange. What kind of phone are you using? 

Pete. 

[Lisa3]

It's a samsung, it's almost like a security feature for numbers. I know other people on three that have same problem