As of 2024, several handheld game consoles are available that can utilize a SIM card for connectivity and also support online gaming. Here’s a summary of notable options:

1. Steam Deck: While primarily a portable PC gaming device, the Steam Deck can run a variety of operating systems, including SteamOS and Windows. Although it doesn't have a built-in SIM card slot, you can connect via USB to a mobile hotspot or external dongles for internet access. More information can be found here.

2. GPD Win 3 and GPD Pocket 3: These devices are handheld PCs that allow you to install Windows and various other software. They do not have a dedicated SIM card slot, but you can use tethering from a smartphone. Various models from GPD may offer more features for gamers. You can find more details here.

3. Android-Based Handhelds: Devices like the GPD Win 2 and some Android gaming handhelds (e.g., AYN Odin) are designed for gaming and can sometimes feature SIM card slots depending on the model, allowing for mobile internet browsing and gaming. Check out the expanded list from CNET for more on these devices.

4. Nintendo Switch (with mobile data): Though the Nintendo Switch does not support SIM cards directly, the Switch Lite model can connect to mobile hotspots created by smartphones with SIM cards. This allows access to online features and gaming. For the best options for handheld gaming, see this GamesRadar+ guide.

5. Ayn Odin: This is another Android-based handheld gaming console that features a SIM card slot allowing for mobile data connectivity, making it suitable for gaming on-the-go. Further details about this console can be found here.

Summary

While traditional handheld consoles like the Nintendo Switch and Steam Deck may not have dedicated SIM capabilities, models like the GPD series and AYN Odin are emerging options that meet your criteria. They provide online functionalities and mobile connectivity through integrated or external means. Consider reviewing the experiences of past users on forums like Reddit or specific gaming-focused reviews to find the best fit for your gaming needs.

Sources

The best gaming handhelds for 2024 - EngadgetThe best gaming handheld 2024 | GamesRadar+Give me the lowdown on handhelds in 2024 : r/SteamDeck - Reddit7 Best Handheld Consoles 2024 | The Strategist - New York MagazineHandheld console running Android/Linux with SIM slot? - RedditBest 7 Must-Have Handheld Game Consoles in 2024 - YouTubeBest Handheld Game Consoles of 2024 - CNET

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