Phone USA at midnight from uk

[megandtess]

Apologies if this is an obvious question but can’t find this on the forum. I can no longer phone USA at midnight to book avios flights from my uk mobile. I did use Skype last year but that has now stopped. I have tried and tried to find the answer online but maybe I’m just too old 😂Please can someone tell me how to phone the USA toll free number from a uk mobile? Many Thanks very much.

[rachyclaire]

We called using viber, they have a free trial as well. We only found out after a £30 call earlier in the week to find there were no seats on our chosen route! 😭