Why does phone lag when talking to business

[trevorhill1959]

I have a relatively new Samsung phone on 3 network. Whenever I call a business phone number there is a lag in the phone/network responding so that the first few sounds that I make (first few letters or numbers) are not heard by the person at the other end of the call. Everything works fine when calling other mobile numbers.
I had wondered if it was a characteristic of my phone. But today I was talking with a British Gas agent and he said that the same thing happens to him, also on 3, with a different model of phone.
It is very frustrating to have to keep repeating myself because the network can't keep up.
Does anyone have an explanation and solution for this please?

[JulieTaylor]

I have the same problem.

[ThreeRuss]

I've got the same issue as well. This happens when I call my mum on her landline. I call most days for 30 minutes or more. I would say that around 50% of the time, a delay of 3 or so seconds comes onto the call after 20 minutes or so.

This has been happening for over a year. I'm sometimes walking round a small local area and sometimes just sat in the house. 

[Shah954]

I'm having the same issue. Three customer service have asked to send my phone back to Samsung when I done previously. When I spoke to Samsung, they done all the updates and found no issue. Can we cancel the contract due to the service not being provided?