On June 23, 2026, the team behind the acclaimed Windows 11 Field Guide at Thurrott.com published two new deep-dive attachments: "test-03" and "cellular-01." These additions arrive as part of the guide's ever-expanding Internet Connectivity chapter, and they pull back the curtain on Microsoft's quiet but relentless work to make network diagnostics and always-connected experiences more visible—and more manageable—for everyday users and IT pros alike.
The Windows 11 Field Guide has long served as the go-to manual for enthusiasts and newcomers navigating Microsoft's latest operating system. Written by Paul Thurrott and Rafael Rivera, the guide blends official documentation with hard-won real-world insights. The two latest PDF attachments, offered exclusively to Field Guide subscribers, represent the kind of granular, screen-by-screen walkthroughs that have made the series indispensable.
What’s Inside "test-03" and "cellular-01"
"test-03" focuses squarely on network testing and diagnostic tools built into Windows 11. It covers everything from the revamped Network & Internet settings hub to the lesser-known command-line utilities that power users can reach for when a Zoom call stutters or a VPN refuses to connect. The guide walks readers through the native Network Speed Test app, the hidden packet capture tools inherited from Windows Server, and the beefed-up Event Viewer logs that now surface Wi-Fi driver crashes with far more clarity than in Windows 10.
Meanwhile, "cellular-01" tackles the cellular and eSIM stack—a feature set that has evolved dramatically since Windows 10 first introduced Mobile Plans. The attachment explains how Windows 11 detects embedded SIM hardware, manages multiple eSIM profiles, and seamlessly toggles between Wi-Fi and mobile data without dropping active connections. It also demystifies the updated SIM PIN management screens and the new cellular data usage dashboard that arrived with the 2025 feature update.
Network Visibility Goes Mainstream
Microsoft has spent several release cycles chipping away at the "it just works" opacity that frustrated users when things didn't work. In Windows 11 version 24H2, the company shipped the Network Diagnostic Toolkit—a set of real-time monitoring graphs accessible directly from Quick Settings. Click the network icon, and users now see live throughput charts for both Wi-Fi and Ethernet, alongside latencies and packet loss percentages. The Thurrott guide explains how to interpret these graphs and when to cross-reference them with the Windows Performance Analyzer traces that Microsoft's support team routinely requests on enterprise tickets.
PowerShell and Command Prompt remain alive and well for network testing. The guide dedicates an entire section to netsh trace, pktmon, and the resurrected pathping command, all of which received updated documentation in the Windows 11 SDK. For the first time, average users can follow a step-by-step recipe to capture a network trace, convert it to Wireshark-compatible format, and share it with a forum helper—all without installing third-party software.
Cellular and eSIM: Always Connected, Finally Explained
The cellular story in Windows 11 has been one of cautious but steady progress. Always Connected PCs—those with Qualcomm Snapdragon or Intel LTE/5G modems—now ship with a unified eSIM provisioning engine that works across carriers in 62 countries. "cellular-01" shows how to download an eSIM profile directly from the Mobile Plans app without ever visiting a carrier's website. It also covers the new "Emergency Profile" feature, introduced in early 2026, which lets users instantly pull down a pay-as-you-go data plan using a credit card, bypassing the typical verification delays.
Crucially, the guide clarifies the often-confusing relationship between the Cellular settings page and the physical SIM tray. On devices like the Surface Pro 10 with 5G, Windows 11 now allows both a physical SIM and multiple eSIMs to coexist, with per-application traffic routing rules controlled through the Firewall & Network Protection panel. The attachment includes a walkthrough for setting up a secondary eSIM as a dedicated backup link for Microsoft Teams, ensuring that critical calls never drop when home Wi-Fi misbehaves.
Why These Updates Matter Now
The timing of these Field Guide attachments coincides with a noticeable uptick in remote and hybrid work troubleshooting requests on Microsoft Answers and Reddit. As more enterprises deploy Always Connected PCs to frontline workers, IT administrators crave reliable documentation on testing and securing cellular connections. Thurrott's guide fills that gap with the precision of a Microsoft MVP and the candor of an independent journalist—calling out where the official documentation still falls short.
Community feedback on earlier Field Guide chapters praised the use of annotated screenshots and registry file examples. The two new attachments follow the same proven format. They include .reg files that users can merge to force-enable hidden network diagnostic panels in the Control Panel—a throwback to the Windows 8 era that still persists in some enterprise builds.
Microsoft's Broader Connectivity Vision
The Field Guide updates underscore a broader shift in Redmond. Network capabilities are no longer treated as plumbing; they are branded features. The new "Advanced network settings" portal, accessible through ms-settings:network-advanced, consolidates adapter options, data usage stats, and hardware properties into a single pane that replaces a dozen tiny old-style dialogs. The Thurrott guide reveals that Microsoft is dogfooding a unified network health score—similar to Apple's Network Responsiveness—that may ship publicly in the 26H2 release later this year.
eSIM management, meanwhile, is set to integrate with Microsoft Intune for enterprise enrollment. According to the guide, admins will soon be able to push eSIM profiles during Autopilot provisioning, making zero-touch deployment a reality for cellular-enabled laptops and tablets. The "cellular-01" attachment teases upcoming API surfaces that third-party VPN clients can use to detect mobile data connections and adjust their compression levels automatically.
Real-World Impact for Windows Enthusiasts
For the average Windows News reader, these guide expansions translate into concrete time savings. Instead of hunting through outdated forum posts, a user can open the Field Guide, search for "slow Wi-Fi," and land on a step-by-step diagnostic flow. The guide explains not just what to click, but what the results mean—whether a failing DNS server is the culprit or a neighbor's Wi-Fi 7 router is stomping on the channel.
The cellular guidance is equally practical. It answers questions like: "Why does my 5G connection show four bars but feels sluggish?" and "Can I use my phone's data plan on my laptop without creating a hotspot?" The answer to the latter is a resounding yes if the carrier supports Windows eSIM, and the attachment includes a compatibility table covering AT&T, T-Mobile, and Verizon in the US, plus global carriers.
How to Access the New Content
The two attachments are part of the paid Windows 11 Field Guide, available at Thurrott.com. Subscribers receive regular updates as Microsoft evolves the OS, and the guide now spans over 900 pages with searchable PDFs and EPUB versions. Public previews of certain chapters occasionally appear on the site, but the network testing and cellular segments require a subscription—a model that has allowed the authors to maintain editorial independence and avoid clickbait.
The Road Ahead
With Windows 11 now entering its fifth year, networking features are finally maturing from "good enough" to genuinely empowering. The Thurrott team's decision to split the Internet Connectivity chapter into multiple specialized attachments signals that Microsoft's roadmap still holds plenty of surprises—perhaps tighter integration with Azure Virtual Desktop optimizations, or a consumer-friendly mesh networking controller built right into the OS.
For now, the release of "test-03" and "cellular-01" gives enthusiasts and IT pros a rare gift: clarity. In an era where operating system documentation is often either too sparse or too corporate, the Field Guide remains the gold standard for understanding what's really happening under the hood. If you've ever stared at a spinning network icon and felt helpless, these new sections are precisely the antidote you need.
As always, we'll keep you updated as Microsoft rolls out additional networking improvements and as Thurrott continues to illuminate the darkest corners of the Windows 11 experience.