The Hyallo blog
Guides and tips for calling any phone, anywhere, for less.
How to call Denmark (+45) and the other Nordic countries
Denmark’s 8-digit numbers with no area codes, plus how to dial Sweden, Norway, Finland and Iceland: which leading 0 to drop, time zones, and what a call costs.
Read moreCalling home while studying abroad: a student’s budget guide
What calling home really costs a student abroad, per country, and how to keep it to a few dollars a month: free apps where they work, cheap per-minute calls where they don’t.
Read moreThe cheapest way to call Brazil from Portugal and the rest of Europe
WhatsApp, your operator’s base rate, an international add-on, or pay-per-minute from the browser: an honest comparison of the ways to call Brazil from Portugal, with real prices.
Read moreHow to make an international call from your laptop or computer
Call any phone abroad from a laptop browser: what you need, the microphone permission step, headset tips, and how to fix "they can’t hear me".
Read moreHow to call an embassy, consulate or government office abroad
Embassies, consulates and tax or pension offices answer ordinary phone lines with long queues. How to reach them from abroad and keep enough credit for the wait.
Read moreWhy won’t my international call connect? Causes and fixes
Wrong number format, a leading 0 that shouldn’t be there, no answer, a blocked or premium number, a microphone the browser can’t use: what each message means and how to fix it.
Read moreHow to call a US toll-free (1-800) number from abroad
1-800, 888, 877 and other US toll-free numbers usually fail from a foreign phone. Here is why, and how to reach them from anywhere for $0.02/min.
Read moreHow to call your US bank from abroad (card blocked, fraud alert, lost card)
Card declined on a trip? How to reach your US bank from another country - the right number, what to do about SMS codes, and how to call for $0.02/min without roaming.
Read moreHow to call Mexico from the US or abroad: the 10-digit format
Since 2019 every Mexican number has 10 digits, and the old 044, 045, 01 and the "1" after +52 are gone. The exact format for landlines and mobiles, with examples.
Read moreHow to call India from abroad: mobiles, landlines and STD codes
The +91 format for Indian mobiles and landlines, when to drop the 0, the main STD codes, and how to call India for $0.08/min from your browser.
Read moreHow to call the UK from abroad: +44, dropping the 0, and 07, 0800 and 03 numbers
How to dial a UK landline or mobile from another country, which UK numbers work from abroad (03 yes, 0800 often not), and why UK mobiles cost more to call.
Read moreCalling a landline vs a mobile abroad: why the price is different
Why calling a mobile abroad often costs more than a landline, what "from" prices mean, and exactly how per-minute billing works - per started minute, unanswered calls free.
Read moreThe best Skype alternatives for international calls in 2026
Skype shut down in May 2025. Here are the best alternatives for calling real phone numbers abroad - and how to pick the right one.
Read moreHow to call a hotel or business abroad without roaming fees
Need to reach a hotel front desk, an embassy, or a shop in another country? Here is how to call any business line abroad for cents, without roaming charges.
Read moreHow country codes work (and how to dial any number abroad)
What the + means, how country codes and area codes fit together, and the exact order to dial an international number from anywhere.
Read moreHow to call a landline or a non-WhatsApp number
WhatsApp can only call other WhatsApp users. Here is the simple way to call a landline, a business, or anyone who is not on the app.
Read moreHow to call Brazil from abroad: the complete guide
Country code, area codes, the leading 9 for mobiles, and the cheapest way to call a Brazilian landline or mobile from another country.
Read moreThe cheapest way to call abroad in 2026
Roaming and carrier international rates are still painfully expensive. Here is how to call any country for a few cents a minute instead.
Read moreeSIM vs internet calling: which is cheaper for calls abroad?
Travel eSIMs are great for data, but they are not always the cheapest way to make a call. Here is how the two compare and when to use each.
Read moreIs browser calling safe? How WebRTC calling works
Calling a phone straight from a web page sounds new, but the technology behind it is mature and encrypted. Here is how browser calling works and why it is safe.
Read moreWiFi calling for international numbers: what actually works
Carrier "Wi-Fi Calling" does not make international calls cheap - it still bills your carrier rates. Here is the difference and how to actually call abroad over Wi-Fi for cents.
Read moreCalling from a cruise ship or a plane without a huge bill
Cellular at sea and in the air is some of the most expensive on earth. Here is how to make calls from a cruise or a flight over Wi-Fi instead - and when it works.
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