How to Fix Slow WiFi on a Hisense Roku TV: Band Selection, DNS, Roku Network Reset, and Firmware Update Fixes

Hisense Roku TVs are among the most popular budget-to-mid-range smart televisions in North America, and the Roku platform is rock-solid—but even a great TV can stream poorly if the WiFi connection isn’t optimized. Whether you’re seeing buffering on Netflix, stuttering during live sports, or the TV won’t hold a stable connection, this guide walks you through every proven fix in order from simplest to most thorough.

Check Your Signal Strength First

Before changing any settings, confirm how strong your TV’s WiFi signal actually is. Roku has a hidden signal screen that’s far more detailed than the standard network info page.

Press Home five times, then Up, Down, Up, Down, Up on your remote.
Select WiFi Secret Screen from the menu that appears.

You’ll see signal strength in dBm, link speed in Mbps, and noise floor readings. Anything weaker than –70 dBm is likely causing intermittent drops and slow speeds. A reading between –50 and –65 dBm is solid. If your signal is weak, moving your router closer or adding a WiFi extender will help more than any software tweak.

Switch to the Right WiFi Band

Most Hisense Roku TVs—including the popular R6, A6H, and U6 series—support both 2.4 GHz and 5 GHz WiFi. Connecting to the wrong band for your situation is one of the most common causes of slow or unstable streaming.

When to Use 5 GHz

If your TV is within 30 feet of the router with no more than one or two walls in between, connect to your 5 GHz network. The 5 GHz band delivers significantly higher throughput—essential for 4K HDR streaming, which Roku recommends at 25 Mbps or higher. The shorter wavelength also means far less interference from neighboring networks in apartments and dense neighborhoods.

When to Use 2.4 GHz

If the TV is far from the router, or there are thick walls, floors, or large appliances in between, the 2.4 GHz band provides better range and wall penetration. Standard HD streaming only needs 5–8 Mbps, which 2.4 GHz handles reliably at distance. The tradeoff is that 2.4 GHz is heavily congested in multi-unit buildings.

How to Switch Bands on a Hisense Roku TV

Press Home and go to Settings > Network.
Select Set up connection > Wireless.
Your TV will scan for networks. Choose the SSID for your preferred band—routers often label them separately, e.g., “MyHome” (2.4 GHz) and “MyHome_5G” (5 GHz).
Enter your password and connect.

If your router uses a single combined SSID with band steering, you can force the band by temporarily disabling one frequency in your router’s admin panel, connecting the TV, then re-enabling it. See our guide on how band steering works for details.

Change Your DNS Server

Slow DNS resolution can make your Roku TV feel sluggish when loading channel menus, launching apps, or buffering before playback even begins. Hisense Roku TVs use whichever DNS server your router assigns via DHCP, but you can override it at the router level with a faster public alternative.

Log into your router’s admin panel (typically at 192.168.1.1 or 192.168.0.1) and set the DNS servers to:

Primary: 8.8.8.8 (Google Public DNS)
Secondary: 8.8.4.4 (Google Public DNS)

Cloudflare’s 1.1.1.1 and 1.0.0.1 are an excellent alternative—often producing lower latency results, especially in North America. After saving, restart both your router and the Hisense Roku TV.

Reset the Roku Network Connection

Roku stores cached network credentials that can become corrupted, especially after a router swap, ISP change, or firmware update. The Roku Network Connection Reset clears these and forces a clean reconnect without wiping your apps or account data.

Press Home on your remote.
Go to Settings > System > Advanced system settings.
Select Network connection reset.
Confirm by selecting Reset connection.
After the TV restarts, go to Settings > Network and reconnect to your WiFi network.

This single step resolves a surprisingly large number of “connected but slow” and “keeps disconnecting” reports from Hisense Roku TV owners.

Update Hisense Roku TV Firmware

Roku regularly pushes OS updates that fix networking bugs, improve streaming stability, and patch security vulnerabilities. Keeping firmware current is especially important if your TV recently started having WiFi issues.

Check for a Roku OS Update

Press Home, then go to Settings > System > System update.
Select Check now.
If an update is available, select Update and let it complete without turning off the TV or interrupting the connection.

To prevent missing future updates, enable Auto update under Settings > System > System update. On Hisense Roku models, Hisense hardware firmware is typically bundled with Roku OS updates, so keeping Roku updated usually covers both layers. For model-specific firmware, check hisense-usa.com/support with your model number (printed on the sticker on the TV’s back panel).

Optimize Your Router for Streaming

Even with good signal strength, a misconfigured router can limit your TV’s throughput. These quick changes make a measurable difference:

Set your 2.4 GHz channel to 1, 6, or 11: These are the only three non-overlapping channels on 2.4 GHz. Adjacent channels like 3 or 7 bleed into neighbors and create interference. Change this in your router’s admin panel under Wireless > Channel.
Enable QoS for your TV: Quality of Service lets you prioritize streaming traffic from the TV’s MAC address. Our guide on setting up QoS on your home router walks through the process for common router brands.
Reduce 2.4 GHz congestion: Move smart bulbs, plugs, and IoT sensors to 2.4 GHz, and reserve 5 GHz for TVs, laptops, and phones that need maximum throughput.

Factory Reset as a Last Resort

If none of the above fixes resolve the issue, a factory reset returns the TV to its out-of-box state. Your installed channels and preferences will be wiped, but Roku’s cloud backup means your channel lineup reinstalls automatically when you sign back into your Roku account.

Press Home, then go to Settings > System > Advanced system settings.
Select Factory reset > Factory reset everything.
Enter the on-screen confirmation code using your remote.
The TV will reboot and return to the initial setup wizard.

Quick Fix Checklist

Use the WiFi Secret Screen (Home ×5, Up Down Up Down Up) to check signal strength.
Connect to 5 GHz if within range; use 2.4 GHz if far from the router.
Set router DNS to 8.8.8.8 / 8.8.4.4 and restart both devices.
Run Roku Network Connection Reset (Settings > System > Advanced system settings).
Check for firmware updates (Settings > System > System update > Check now).
Set your 2.4 GHz channel to 1, 6, or 11 and enable QoS for the TV.
Factory reset as a last resort.

Still seeing slow speeds after all of this? Run a speed test from a laptop or phone on the same WiFi network to isolate whether the problem is TV-specific or affects your whole connection. If other devices are fast but the Hisense Roku TV is slow, check whether the TV’s WiFi adapter has a physical obstruction—mounting a TV flat against a metal wall bracket can significantly attenuate the internal antenna. Adding a mesh WiFi node in the same room as the TV is often the simplest permanent fix for distance or obstruction issues.