What is data roaming?

Published on May 9, 2025 at 4:03 pm

Author: Andrew Noble

What is data roaming?

When you venture beyond your home network's reach, using cellular data on your mobile device is known as data roaming. This feature allows you to stay connected to the internet for web surfing, checking emails, and messaging even while traveling abroad. Once you leave your network's range, your phone automatically connects to a local partner network to maintain internet access.

Mobile carriers establish agreements with international networks to facilitate roaming.. However, this convenience can come at a high cost.. Roaming fees vary based on several factors, including:

To avoid unexpected charges and bill shock,, it's crucial to understand how data roaming works and monitor your usage.

Why do users need data roaming when traveling?

Imagine you're exploring a new country and need immediate directions to a tourist attraction or want an app's help translating signs; data roaming becomes indispensable. Without it, you'd be hunting for public Wi-Fi, which might be spotty or unavailable in remote locales. 

For business travelers, roaming is essential as they require constant email access and cloud-based tools to remain efficient while traveling internationally.

Additionally, data roaming offers peace of mind during emergencies, enabling quick access to nearby hospitals, local authorities if needed, or translation services & apps.

While Wi-Fi can be an alternative option, it often lacks the convenience and widespread availability of cellular networks. By enabling data roaming on your mobile device, you ensure reliable connectivity and access to essential services wherever your travels take you.

What are the costs and risks of data roaming?

Data roaming can quickly become expensive, particularly when users are unaware of how charges accumulate. International usage is typically billed at much higher rates than domestic data, due to agreements between global carriers. 

Additionally, users may face unexpected costs from 

Beyond the financial implications, data roaming poses security risks like fake BTS towers ("Stingrays") in border areas. To stay safe, make sure to use VPNs with AES-256 encryption and disable automatic Wi-Fi connections. For financial transactions, prefer SMS 2FA over app-based authentication when roaming. Hackers might exploit weak network security to gain access to personal or financial information.

Another issue is exceeding data limits while abroad. Many service providers impose hefty roaming fees once a user surpasses their plan's allowance. Some networks may even slow down speeds or suspend service until additional data is purchased, causing inconvenient disruptions when staying connected is essential.

Latest EU regulations require carriers to send real-time alerts at 80%/100% of data usage. However, these protections don't apply when roaming beyond Europe. In the UK, operators must now provide 48-hour usage forecasts under Ofcom's FURTHER rules.

Why can data roaming charges be high?

Roaming costs are driven by agreements between mobile operators and international networks, leading to premium rates. Depending on your carrier, data usage can cost:

Additionally, roaming fees often encompass extra expenses for phone calls and text messages. These prices vary by country, with certain regions imposing steeper costs because of limited competition among service providers.

How are roaming fees calculated?

Roaming charges hinge on three key elements:

Some carriers bill per megabyte for data use, while others provide daily or weekly roaming packages. The cost of calls typically fluctuates based on whether they are incoming or outgoing, with international calls generally being more expensive. Similarly, SMS fees are impacted by the agreements between networks in different countries.

You can estimate your mobile data needs with our calculator (LINK TO CALCULATOR PAGE)

What happens if you exceed your data limits while roaming?

Exceeding your data limit while traveling can lead to hefty additional roaming charges. Many service providers charge per megabyte after you go over your allowance. Some might throttle your data speed, whereas others could suspend your service until you purchase more data or switch to a different plan.

Pro tip: Limit background data before traveling:

What alternatives help reduce data roaming costs?

Using Wi-Fi hotspots is an excellent strategy to dodge expensive roaming charges. Many public venues, such as hotels, cafes, airports, and shopping centers, provide complimentary Wi-Fi access. This allows travelers to remain connected without dipping into their mobile data.For those who don’t want to always be in the hunt and having possible disruptions, eSIMs are the best choice. Supported by many smartphones (available on iPhone XR/newer and Pixel 4+), eSIM allows users to activate international data plans online without needing a physical card. 

Amigo eSIM offers plans for 190+ destinations. Explore all the plans here to find the best one that suits your travel. 

However, some carriers block eSIM roaming in sanctioned countries (Russia, Cuba). Check compatibility in your device settings first.

Purchasing a local SIM card upon arrival can also cut costs, though some countries require passport registration (UAE, Turkey) or impose temporary tourist taxes (Croatia: €3/week). Always verify local telecom laws before purchase. It should also be noted that local SIM cards are very expensive in some countries.

For those hopping between countries swiftly, international SIM cards offer coverage across multiple nations at prices lower than typical roaming fees, but finding these can be another issue.    

Amigo eSIM also provides regional eSIMs that cover multiple countries. Portable hotspot devices present yet another solution by enabling multiple gadgets to connect through one internet source while sidestepping hefty roaming fees. These devices tap into local networks and can be loaded with cost-effective data packages before you embark on your journey. But charging them becomes another issue to worry about. 

Conclusion 

Data roaming is an essential service for travelers, ensuring seamless connectivity for navigation, communication, and emergencies. However, it can also be expensive and pose security risks if not managed properly. Understanding how roaming fees are calculated, monitoring data usage, and implementing cost-saving strategies, such as usingeSIMs, can help mitigate excessive charges. By planning ahead and adopting smart data management practices, travelers can stay connected without unexpected expenses or security vulnerabilities.

Visit Amigo eSIM’s destination explore page and get your eSIM before your next travel!