UK builders: which phone/SMS provider is best for Vapi?

I’m building an AI voice agent in Vapi and I need a provider that can handle both:

✅ Inbound/Outbound calling (UK numbers)

✅ SMS (send + receive, ideally)

✅ Good reliability in the UK (deliverability + call quality)

✅ Reasonable pricing + easy setup

I know Twilio is the common choice and looks cost-effective, but I’ve heard mixed feedback about reliability in the UK.

For anyone shipping real client systems in the UK:

Which provider has been the most reliable for you?

If you’ve used it with Vapi specifically, I’d love to know:

Thanks in advance — want to pick something stable before I roll this out to clients.

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