Useful links:
- Calling codes: https://en.wikipedia.org/wiki/List_of_country_calling_codes#Overview
- List of SMS verification sites: https://www.reddit.com/r/FREEMEDIAHECKYEAH/wiki/storage/#wiki_sms_verification_sites
As some of these sites are a bit sketchy, make sure to keep privacy & security measures. Learn more here: https://www.privacyguides.org/en/desktop-browsers/
UPDATE - I now just use https://5sim.net and choose England as the country (it works the best for me)!
