An eSIM (embedded SIM) is a digital SIM card that's built into your device. Unlike traditional physical SIM cards, eSIMs can be activated remotely by scanning a QR code or using an app. For international travel, eSIMs allow you to connect to local networks in your destination country without needing to purchase and insert a physical SIM card. OnAirSim helps you compare eSIM plans from multiple providers to find the best option for your travel needs.

Most modern smartphones support eSIM technology, including iPhone XS and newer models, Google Pixel 3 and newer, Samsung Galaxy S20 and newer, and many other recent Android devices. You can check our compatibility guide on this page or look in your phone's settings for 'Cellular Plans' (iOS) or 'SIM Manager' (Android). OnAirSim provides a comprehensive compatibility checker to help you verify if your device supports eSIM before purchasing a plan.

OnAirSim is an independent comparison platform and directory that helps you find and compare eSIM plans from multiple providers. We don't sell eSIMs directly - instead, we partner with leading eSIM vendors like Airalo, Holafly, Nomad, and others to bring you comprehensive coverage options and competitive pricing. Our platform allows you to compare plans side-by-side, read reviews, and find the best deal for your specific travel needs.

Data needs vary depending on your usage patterns and trip duration. Light users (email, messaging, maps) typically need 500MB-1GB per day, while heavy users (video streaming, video calls, social media) may need 2-5GB per day. Use our data calculator tool on this page to estimate your needs based on your specific activities. OnAirSim helps you find plans that match your calculated data requirements from our network of trusted providers.

Yes! Many eSIM providers offer regional or global plans that work across multiple countries. For example, you can find European plans that work in 30+ countries, or global plans that cover 100+ destinations. OnAirSim makes it easy to compare multi-country options from different providers, helping you find plans that cover all your destinations without needing to purchase separate eSIMs for each country.

eSIM activation is typically done by scanning a QR code provided by your eSIM provider. The process varies slightly by device: on iPhone, go to Settings > Cellular > Add Cellular Plan; on Android, go to Settings > Connections > SIM Manager > Add Mobile Plan. Some providers also offer app-based activation. OnAirSim provides detailed setup guides for different devices and connects you with providers that offer the easiest activation process.

In most cases, yes! eSIM plans are typically 70-90% cheaper than traditional international roaming charges from your home carrier. The exact savings depend on your destination and usage, but travelers often save hundreds of dollars on longer trips. OnAirSim helps you compare eSIM prices with estimated roaming costs, showing you potential savings for your specific travel plans.

Most eSIM providers offer top-up options that allow you to purchase additional data through their app or website. Some plans also offer data rollover or unlimited options with speed throttling after a certain amount. OnAirSim shows you which providers offer the most flexible top-up options and helps you choose plans with features that match your needs.

Yes! eSIMs are primarily for data connectivity. You can keep your home number active for calls and texts while using the eSIM for data, or use messaging apps like WhatsApp, Telegram, or iMessage that work over data. Many travelers use this dual-SIM approach to stay connected affordably. OnAirSim helps you find data-only eSIM plans that work perfectly with this setup.

Coverage varies by destination and provider. Some excel in Europe, others in Asia or the Americas. OnAirSim aggregates coverage information from all major providers including Airalo, Holafly, Nomad, GigSky, and others, allowing you to compare network partnerships and coverage maps for your specific destinations. We help you find providers with the strongest local network partnerships in your travel areas.

You can purchase eSIMs well in advance of your trip, as most plans only activate when you first connect to a network in your destination country. However, some plans have expiration dates from purchase, so check the terms. OnAirSim shows you activation policies for different providers and helps you choose plans with flexible activation windows that suit your travel timeline.

First, ensure your device is eSIM compatible and that you've followed the activation steps correctly. Try restarting your device, checking that data roaming is enabled for the eSIM, and manually selecting the network. If issues persist, contact your eSIM provider's customer support. OnAirSim provides troubleshooting guides and connects you with providers known for excellent customer service and technical support.

eSIM technology works in most countries worldwide, but availability can vary by provider and local regulations. Some countries have limited eSIM support or restrictions. OnAirSim maintains up-to-date information about eSIM availability by country and helps you find providers with coverage in even hard-to-reach destinations. We also suggest alternative connectivity options when eSIM isn't available.

Most eSIM plans are designed for single-device use, but you can often use your phone's hotspot feature to share data with other devices like tablets or laptops. Some providers offer multi-device plans or family sharing options. OnAirSim helps you compare providers that offer flexible sharing options and identifies plans that work best for travelers with multiple devices.

OnAirSim operates as an affiliate marketing platform. When you purchase an eSIM through our links, we receive a small commission from the provider at no extra cost to you. This allows us to keep our comparison service free while maintaining independence in our reviews and recommendations. We're transparent about our partnerships and always prioritize helping you find the best deal for your needs.