My HP OmniBook X running Windows 11 ARM64 has an unusual tethering problem. Jio True 5G reaches about 610 Mbps directly on my phone, but the laptop gets roughly 0.59 Mbps download, 0.08 Mbps upload, and 350+ ms latency when connected through either Wi-Fi Mobile Hotspot or USB tethering. The same limit occurs with a second phone, so it does not appear to be specific to one phone, hotspot connection, or Wi-Fi adapter. I have an unlimited 5G plan and have used about 12 GB this month. The laptop has a Snapdragon X Plus processor, Qualcomm FastConnect 6900 Wi-Fi 6E, 16 GB RAM, and Windows 11 Home ARM64. I have already tried a Windows network reset, reinstalling drivers, changing DefaultTTL to 65, turning off Metered Connection, resetting TCP autotuning, disabling IPv6 temporarily, and disabling Receive Segment Coalescing. None of these changed the result. Could this be a carrier hotspot restriction, an ARM64 Windows networking issue, a corrupted network profile, or a QoS policy?
3 Answers
The fact that two different phones produce the same result does not completely rule out the carrier. Some mobile providers identify tethered traffic and apply a separate hotspot speed limit, while traffic generated directly on the phone remains fast. Testing with a SIM from another carrier, such as Airtel or Vi, would be a useful way to separate a carrier restriction from a laptop problem. If another carrier is also capped, then Windows or the laptop becomes much more likely.
The Snapdragon X Plus and ARM64 Windows details are important. Check Task Manager's Wi-Fi performance graph while running a test. If Windows itself shows only about 0.6 Mbps, this is a real throughput problem rather than a browser or speed-test display issue. Also check Windows Update history for Qualcomm or HP network-driver updates; these laptops depend heavily on the OEM drivers delivered through Windows Update. Forget both hotspot networks completely and reconnect them as fresh profiles, since a damaged network profile can survive ordinary driver reinstalls.
You can also inspect QoS settings under Computer Configuration > Administrative Templates > Network > QoS Packet Scheduler. If the policy named “Limit reservable bandwidth” is configured, return it to Not Configured or set it to 0 where appropriate. Windows Home may not include the Group Policy Editor, so registry or Local Group Policy tools would be needed. That said, this setting normally does not create an exact 0.6 Mbps cap, so carrier hotspot throttling and an ARM64-specific driver or OEM networking component should be investigated first.
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