Your Android phone repeatedly disconnects from Wi-Fi – often right when you are on an important video call, downloading a file, or while an automatic backup is running overnight. You might wake up to find an incomplete WhatsApp backup, a failed YouTube offline download, and the Wi-Fi icon flickering in and out on the notification bar. This is a very common issue in India, affecting brands like Redmi, Realme, Samsung, Poco, and Vivo. And honestly, the router isn’t always the culprit; sometimes, the phone’s own settings cause these repeated disconnections.
In this guide, we will explore every possible reason and explain each fix in detail.
First, understand the pattern the Wi-Fi disconnects follow.
Before solving the problem, it’s important to note:
- Is only your phone disconnecting, or other devices in the house as well?
- If it’s your phone – the problem is with the phone.
- If it’s all devices – the problem is with the router or the ISP.
- When does it disconnect?
- When the screen turns off
- While using certain apps
- Automatically at night
- At random times
- Does it reconnect on its own after disconnecting?
Understanding this pattern helps find the right fix quickly.
Main reasons why Android phones repeatedly disconnect from Wi-Fi
1. Wi-Fi Sleep Policy – The most common reason
Android has a setting that automatically disconnects Wi-Fi when the screen turns off. This is designed to save battery, but it interrupts background downloads and syncing.
2. Adaptive Wi-Fi or Smart Network Switch
This feature automatically switches to mobile data when the Wi-Fi signal is weak – even if the device is connected to Wi-Fi.
3. Wi-Fi Frequency Band Conflict
If the router broadcasts on both the 2.4GHz and 5GHz bands and the phone repeatedly switches between them, a temporary disconnection occurs.
4. Router DHCP lease expiration
The router assigns an IP address to each device with a specific time limit. If the lease is not renewed properly, the connection drops.
5. Many devices are connected to a single router.
In Indian households, 8–10 devices are often connected to the same router. When the router becomes overloaded, it drops some of the devices.
6. Wi-Fi Driver or Software Bug
Sometimes, a bug appears in the Wi-Fi driver after an Android update.
7. IP Conflict
If the same IP is assigned to two devices, one of them gets disconnected.
8. Battery Optimization – apps are restricting Wi-Fi
Aggressive battery saver mode can throttle or turn off Wi-Fi in the background.
All solutions for an Android phone repeatedly disconnecting from Wi-Fi
Solution 1 – Prevent Wi-Fi from going to sleep
This is the first and most effective fix.
The location of this setting varies depending on the Android version and the brand.
Stock Android / Pixel:
- Settings > Network & Internet > Wi-Fi
- Tap on the saved network
- Go to Advanced settings
- Set “Keep Wi-Fi on during sleep” to “Always”
Samsung (One UI):
- Settings > Connections > Wi-Fi
- Three dots > Advanced
- Turn off “Switch to mobile data”
- Check “Detect suspicious networks” and “Auto reconnect”
Xiaomi/MIUI:
- Settings > Wi-Fi
- Tap and hold Connected network
- “Manage network settings” > “Keep Wi-Fi on during sleep” > Always
Realme/Oppo (ColorOS):
- Settings > Wi-Fi > Tap on that network
- Enable “Keep Wi-Fi on when screen turns off”
Method 2 – Turn off Adaptive Wi-Fi / Smart Network Switch
This feature automatically switches from Wi-Fi to mobile data when the Wi-Fi signal is weak – even if you want to keep using Wi-Fi.
On Samsung devices:
- Settings > Connections > Wi-Fi
- Three dots > Advanced
- Turn off “Switch to mobile data”
- Also turn off “Auto connect to hotspots”
In Xiaomi/MIUI:
- Settings > Wi-Fi > Advanced settings
- Turn off “Auto switch to better network” or “Smart connectivity”
On Realme:
- Settings > Additional Settings > Wi-Fi Assistant – turn off
How does it work?
When this feature is enabled, the phone constantly switches between Wi-Fi and mobile data. This makes it appear as though the Wi-Fi is disconnecting, whereas the phone is actually performing the switch itself.
Method 3 – Exclude Wi-Fi from Battery Optimization
Aggressive battery optimization can restrict Wi-Fi in the background.
Steps:
- Settings > Battery > Battery Optimization (or App Battery Management)
- Select “All apps”
- Set Wi-Fi-related system processes to “Don’t optimize”
- Also, exempt apps that use Wi-Fi (such as WhatsApp and Google Photos)
A special step for Samsung:
- Settings > Battery > Background usage limits
- “Put unused apps to sleep” and “Auto disable unused apps” – manage carefully
In MIUI:
- Settings > Battery > Choose apps > Set apps that require continuous Wi-Fi to “No restrictions”
Method 4 – Forget the Wi-Fi network and reconnect
Sometimes, the configuration of a saved network gets corrupted.
Steps:
- Settings > Wi-Fi
- Tap the network name
- Select “Forget” or “Forget Network”
- Scan for Wi-Fi again
- Find the network, enter the password, and connect
Extra tip:
When connecting, go to “Advanced options” and set the IP settings to “DHCP” (if a static IP was set manually, remove it).
Solution 5 – Restart the router and change the channel
If there are too many devices connected to the router or the channel is congested:
Restart the router:
- Turn off the router, wait 60 seconds, and turn it back on.
Change Wi-Fi Channel:
- Open the router’s IP address (192.168.1.1 or 192.168.0.1) in your browser.
- Go to the Wi-Fi settings.
- Change the channel from “Auto” to a less crowded channel.
- In India, prefer channel 1, 6, or 11 for the 2.4GHz band.
Increase DHCP lease time:
- DHCP section in router settings
- Increase the lease time (e.g., from 24 hours to 48 hours)
Method 6 – Reset the phone’s network settings
This restores all Wi-Fi, Bluetooth, and mobile network settings to their defaults.
Steps:
- Settings > General Management (or Additional Settings)
- Reset > Reset Network Settings
- Confirm
Keep in mind:
- All saved Wi-Fi passwords will be removed
- Bluetooth pairing will be removed
- VPN configurations will be reset
So, first note down the Wi-Fi passwords.
After that, restart the router and reconnect to the Wi-Fi.
Tip 7 – Fix the Wi-Fi Frequency Band – Prefer 2.4GHz.
If your router is dual-band (2.4GHz + 5GHz) and both bands share the same name, your phone will keep switching between them.
Solution 1:
- Assign different names to the two bands in the router settings:
- HomeWifi-2.4
- HomeWifi-5
Solution 2 (on the phone):
- Go to “Advanced” when connecting to Wi-Fi.
- Set the “Preferred frequency band” to 2.4GHz.
Why 2.4GHz is better:
It offers greater range and is less affected by walls. In typical Indian homes, 2.4GHz remains more stable.
Solution 8 – Wi-Fi Protected Management Frames (PMF) – Advanced Fix
Some routers have a PMF setting that causes compatibility issues with older phones.
In the router settings:
- Wi-Fi > Security settings
- Set PMF to “Optional” or “Disabled”
This step is technical but quite effective – especially when using TP-Link, D-Link, or Tenda routers.
Solution 9 – Check for Software Updates
If the problem started after an update:
- Settings > Software Update / System Update
- Install any new patch that is available.
If no update is available, check the brand’s community forums – you can find bug reports and workarounds there.
- Xiaomi: en.miui.com/forum.php
- Realme: c.realme.com
- Samsung: samsung.com/in/community/
Method 10 – Disable Wi-Fi Scan Throttling in Developer Options
This is an advanced fix.
Enable Developer Options:
- Tap 7 times on Settings > About Phone > Build Number.
In Developer Options:
- Settings > Developer Options
- Disable “Wi-Fi scan throttling”
This setting slows down Wi-Fi scanning, which sometimes causes the connection to become unstable.
Solution 11 – Test in Safe Mode
If the Wi-Fi is disconnecting due to a third-party app:
Enter Safe Mode:
- Long-press the power button.
- Long-press “Power Off”.
- “Reboot to Safe Mode” – OK.
Stay in Safe Mode for 30–40 minutes. If the Wi-Fi remains stable, it means an app is causing the issue.
Exit Safe Mode and uninstall recently installed apps one by one.
Method 12 – Manually Set a Static IP
If IP assignment via DHCP keeps failing:
Steps:
- Tap on Settings > Wi-Fi > Connected network
- Advanced or Edit (pencil icon)
- Select IP settings: Static
- Enter:
- IP Address : 192.168.1.50 (within router range)
- Gateway: 192.168.1.1
- DNS 1: 8.8.8.8
- DNS 2: 8.8.4.4
- Save
Useful Free Tools
| Tool | Feature | Price |
|---|---|---|
| WiFi Analyzer (Play Store) | Checking Wi-Fi channels and signal strength | $0 |
| Network Signal Info | Connection details and IP information | $0 |
| Fing | Detecting IP conflicts on the network | $0 |
| PingTools | Connection stability test | $0 |
| Router admin app (brand specific) | Managing router settings | $0 |
Visit fixtech.in for more Android Wi-Fi troubleshooting guides.
FAQs – Android phone repeatedly disconnecting from Wi-Fi
1. Is the problem caused by the router or the phone?
Check using another device. If the connection remains stable, the issue lies with the phone.
2. Why does Wi-Fi disconnect when the screen turns off?
Due to the Wi-Fi sleep policy. A fix for this is provided in Solution 1.
3. Will changing the Wi-Fi password make a difference?
If many devices are connected, changing the password and connecting only the essential ones will reduce the load on the router.
4. Is the 5GHz band better than the 2.4GHz band?
It offers higher speeds but has a shorter range. In typical Indian homes, the 2.4GHz band tends to be more stable.
5. The problem persists even after a network reset – what should I do?
Check the router’s PMF setting (Solution 8), set a static IP (Solution 12), and visit the brand’s forums.
6. Will a factory reset be necessary?
Only in very rare cases. Try all the other solutions first; a factory reset is the last resort.
Final Thoughts
An Android phone repeatedly disconnecting from Wi-Fi is certainly an irritating issue, but in most cases, it can be resolved by simply adjusting settings related to the Wi-Fi sleep policy, adaptive network switching, or battery optimization. Try the solutions mentioned above in the given order: start with software fixes, move on to router settings, and finally, try the advanced options. Following each step carefully will surely resolve the problem of your Android phone frequently disconnecting from Wi-Fi.