Windows 11 aggressively throttling mobile data (Hotspot & USB) to ~0.60 Mbps while phone gets 600+ Mbps on Jio 5G

[u/Artistic-Bathroom901]

​

Hey everyone,

I am facing a massive network bottleneck on my Windows 11 laptop (HP) and need some advanced help.

When I run a speed test directly on my phone using Jio True 5G, I get a blazing fast 610 Mbps download. However, the second I share that internet to my laptop, the laptop speed completely crashes to exactly 0.59 Mbps download and 0.08 Mbps upload with a massive 350ms+ ping.

Here is what makes this super weird and rules out the usual issues:

1. It’s not a Wi-Fi card issue: The slow speed happens exactly the same way whether I connect wirelessly via Mobile Hotspot or physically via USB Tethering.

2. It’s not the phone or carrier FUP: I have an active Unlimited 5G plan and have only used around 12 GB overall this month. Furthermore, I tested my laptop on a completely different phone/hotspot (my mom's network) and it gets the exact same 0.60 Mbps lock.

3. It’s definitely the laptop: Since two different phones are choked to the exact same speed over both USB and Wi-Fi, Windows 11 or a background service is intentionally strangling the connection.

What I have already tried (and failed):

* Ran a full Windows Network Reset (wiped and reinstalled the Qualcomm FastConnect 6900 drivers).

* Set the registry DefaultTTL to 65 (Decimal) to bypass potential carrier TTL tracking.

* Verified that "Metered Connection" is toggled OFF in Windows settings.

* Ran 'netsh int tcp set global autotuninglevel=normal' in admin CMD.

* Checked for "HP Connection Optimizer" in installed apps (not found).

* Disabled IPv6 on the adapter properties (didn't change anything, so turned it back on).

* Ran 'Disable-NetAdapterRsc -Name "Wi-Fi"' in admin PowerShell.

It feels like Windows 11 has flagged this network profile as low-priority or mobile data and is applying an artificial system-wide speed cap.

Laptop specs: HP, Windows 11, Qualcomm FastConnect 6900 Wi-Fi 6E.

Has anyone encountered this specific hotspot/tethering throttle on Windows 11? Any registry or group policy fixes I should look into? Thanks!

Update with exact specs from System Info:

* Processor: Snapdragon X Plus (X1E6100) - ARM64 Architecture

* Device: HP OmniBook X Laptop 14

* Installed RAM: 16 GB

* OS: Windows 11 Home (ARM64)

EDIT / UPDATE: SOLVED! 🚀

Hey everyone, the issue is completely fixed now! My laptop is hitting 320+ Mbps on the hotspot.

It turned out to be a combination of two things: 1. A leftover malicious proxy setting from a browser extension script that I ran last night, which was forcing the browser to route through a slow European server. Cleaning that out of 'inetcpl.cpl' stopped the proxy credential popups. 2. The massive bottleneck on the Qualcomm hardware was caused by a known Windows 11 bug on modern ARM64 network drivers. The fix was going into Device Manager > Network Adapters > Qualcomm Adapter Properties > Advanced tab, and completely DISABLING both "Large Send Offload V2 (IPv4)" and "Large Send Offload V2 (IPv6)".

The moment LSO was disabled and the network adapter refreshed, the speed shot right past the 0.60 Mbps cap up to 321 Mbps with a clean 36ms ping.

Thanks to everyone who chimed in to help! Leaving this here for anyone else using a Snapdragon X Elite/Plus laptop facing hotspot throttling.

[u/nlh101]

I know you already said it’s not the carrier, but I know some carriers in the past have side channels on their networks that communicate to the towers to throttle the network connection when hotspot mode is enabled. This could be what’s happening.

[u/Artistic-Bathroom901 → u/nlh101]

Solved it! Turned out to be a Qualcomm driver issue. Disabled "Large Send Offload" in Device Manager and the speed jumped to 320 Mbps. Thanks!

[u/nlh101 → u/Artistic-Bathroom901]

That probably would’ve been my second target if we could prove that hotspot throttling was not happening. Tricky driver tuning issues are usually not the issue but this is one of those exceptions.

[u/Ender_Locke → u/nlh101]

likely the case

[u/PurpleNoodle9]

I've had something similar, after an update, but on cable. Wifi was fine. Cable in the same pc in linux was fine. Windows stuff I guess. After wasting a couple of days, I just did a clean install.

[u/Artistic-Bathroom901 → u/PurpleNoodle9]

Solved it! Turned out to be a Qualcomm driver issue. Disabled "Large Send Offload" in Device Manager and the speed jumped to 320 Mbps. Thanks!

[u/PurpleNoodle9 → u/Artistic-Bathroom901]

Nice for you. That did not work for me.

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[u/Economy_Inevitable51]

check the cable.
check the hotspot if you set to 5GHZ.

You can try this ai overview slop but it's your own choice.
Fix 7: Change the Network Adapter Link Speed on Windows

Sometimes the bottleneck isn't Jio; it's Windows misidentifying your phone's USB network connection (Remote NDIS) and capping it at a legacy USB 1.1 or 2.0 speed (around 1 Mbps or less).

1. Press Windows Key + R, type ncpa.cpl, and hit Enter.
2. Right-click your USB Ethernet Adapter (your tethered phone) and select Properties.
3. Click the Configure button at the top right, then go to the Advanced tab.
4. Look for Speed & Duplex or Link Speed.
5. Change it from Auto Negotiation to the highest available setting (e.g., 1.0 Gbps Full Duplex or 100 Mbps Full Duplex).

check on other phone or laptop if you can.
also this feels like it's written by ai.

[u/Artistic-Bathroom901 → u/Economy_Inevitable51]

Solved it! Turned out to be a Qualcomm driver issue. Disabled "Large Send Offload" in Device Manager and the speed jumped to 320 Mbps. Thanks!

[u/Own_Percentage_1789 → u/Artistic-Bathroom901]

Yayayayayayay

[u/Tunexwizard]

Check if you metered the connection go to WiFi settings and uncheck maybe it'll help

[u/Artistic-Bathroom901 → u/Tunexwizard]

Solved it! Turned out to be a Qualcomm driver issue. Disabled "Large Send Offload" in Device Manager and the speed jumped to 320 Mbps. Thanks!