International Calling Checklist: Everything You Need Before Your First Call

Making your first international call can feel overwhelming. Between exit codes, country codes, timezone math, and unexpected charges, there are plenty of places where things can go wrong. That is why we put together this checklist. Run through it before you dial, and you will connect on the first try without any surprises on your phone bill. For a deeper walkthrough, see our complete international calling guide.

The Complete International Calling Checklist

Verify the full phone number (country code + local number)
Check the dialing format (exit code 011 or + symbol)
Confirm landline vs. mobile (different formats in many countries)
Check the timezone (don't call at 3 AM their time)
Estimate the cost (carrier rates vs. VoIP rates)
Choose your calling method (carrier, calling card, VoIP app, browser-based)
Test your connection (WiFi recommended for VoIP)
Save the number in international format (always use the + prefix)

Checklist Breakdown

1. Verify the Full Phone Number

Every international number starts with a country code. The UK is +44, India is +91, Mexico is +52, and so on. After the country code comes the local number, which may include an area or city code. A missing digit or an extra zero at the start is the most common reason calls fail. If someone gives you a local number, always ask them to confirm the full version including the country code.

2. Check the Dialing Format

If you are calling from a US or Canadian landline, you need to dial the exit code 011 before the country code. From a mobile phone, you can simply use the + symbol instead. The plus sign is universally recognized and automatically replaced with the correct exit code for whatever country you happen to be in. Most VoIP services and browser-based platforms like BoraPhone handle this formatting for you.

3. Confirm Landline vs. Mobile

In many countries, landline and mobile numbers have different lengths and prefixes. For example, UK landlines start with area codes like 020 for London, while UK mobiles start with 07. Some countries, like Italy, require you to include a leading zero even when dialing internationally. Getting this wrong means your call will not connect.

4. Check the Timezone

This is the step people forget most often. Before you call, look up the current time at your destination. A quick search for "current time in [city]" takes five seconds and saves you from waking someone at an unreasonable hour. If you call regularly, keep a world clock widget on your phone or desktop.

5. Estimate the Cost

Traditional carrier rates for international calls range from $1.00 to $3.50 per minute depending on the destination. A 20-minute call to India through your US carrier could cost you $30 or more. VoIP services typically charge between $0.02 and $0.15 per minute for the same routes. Check our international calling rates comparison for real data across 50 countries.

6. Choose Your Calling Method

You have four main options. Your mobile carrier is the most convenient but the most expensive. Calling cards offer prepaid rates but come with hidden fees and expiration dates. VoIP apps require a download and account setup. Browser-based services like BoraPhone let you call directly from your browser with no installation, making them the fastest way to get started. For a full breakdown of modern options, see our guide to the best Skype alternatives in 2026.

7. Test Your Connection

If you are using any internet-based calling method, your connection quality matters. WiFi is always preferred over mobile data. A stable connection with at least 1 Mbps upload speed will give you clear, uninterrupted audio. If you are on a crowded public WiFi network, consider switching to your mobile data or finding a quieter network before dialing.

8. Save the Number in International Format

Always store international contacts with the + prefix followed by the country code and full number. This way the number works regardless of which country you are calling from. For example, save a UK number as +44 7700 900123, not 07700 900123. This small habit will save you formatting headaches every time you call.

Common Mistakes to Avoid

Dialing the leading zero twice. Many local numbers start with a zero that you drop when adding the country code. Dialing +44 07700 instead of +44 7700 will cause the call to fail.
Forgetting to enable international calling on your carrier plan. Some carriers block international calls by default. You may need to call your provider or toggle a setting in your account before your first call goes through.
Assuming all VoIP apps are free. App-to-app calls (like WhatsApp to WhatsApp) are free, but calling a real phone number always has a per-minute cost. The difference is that VoIP rates are dramatically lower than carrier rates.
Ignoring call quality for the cheapest rate. The cheapest calling card or service is not always the best. Poor routing can mean dropped calls, delays, and robotic audio. Look for services that prioritize call quality alongside low rates.

FAQ

Do I need a special plan to make international calls?

With a traditional carrier, yes. Most standard plans do not include international calling, and per-minute rates without a plan can be very expensive. With a VoIP or browser-based service like BoraPhone, you do not need any special plan. You simply add credit and call at the listed per-minute rate.

Can I call any country using VoIP?

Most VoIP services support calls to over 200 countries and territories. BoraPhone offers global coverage with no country restrictions. Some extremely remote destinations may have higher rates, but you can still connect.

What if my international call does not go through?

First, double-check your number format using the checklist above. Make sure you have the correct country code and that you have not included an extra leading zero. If the format is correct, check whether your carrier or service has any restrictions on the destination country. With BoraPhone, you get a 100% refund if a call fails to connect, so you are never charged for an unsuccessful attempt.