Wi-Fi not working on Samsung Galaxy A5: all the reasons and how to fix it

Your Samsung Galaxy A5 (Whether it's a 2015, 2016, or 2017 model) has suddenly stopped connecting to Wi-Fi? Networks aren't showing up, the connection keeps dropping, or the Wi-Fi indicator is flashing gray? This problem is familiar to many owners of this line—and the causes can be either software glitches or hardware issues. In this article, we'll look into it. all possible scenarios, from trivial router errors to hidden defects of the Wi-Fi module, and we will also give step-by-step instructions for every occasion.

Peculiarity Samsung Galaxy A5 — its sensitivity to firmware updates and power saving settings. For example, after updating to Android 8.0 Oreo or Android 9 Pie Many users have experienced Wi-Fi disconnecting on its own or not turning on at all. But don't rush to take your phone to a service center: in 80% of cases, the problem can be resolved on your own in 10-15 minutes. Let's start with the simplest solution.

1. Basic checks: router, network, and phone settings

Before digging deeper, make sure the problem is with the phone itself and not with the signal source. Here minimum checklist, which will help to filter out external factors:

• 📶 Check other devices: Connect your laptop, tablet, or other phone to the same network. If Wi-Fi works everywhere except Samsung A5 — the problem is in the smartphone.
• 🔄 Reboot your router: Unplug the power for 30 seconds, then plug it back in. Wait until the system boots up completely (the indicators should be steady).
• 📱 Airplane mode: turn it on and off on your phone (Settings → Connections → Airplane Mode). This will reset the network settings on the fly.
• 🔒 Wi-Fi password: It may have been changed. Try reconnecting by entering the password manually (sometimes autofill fails).

If Wi-Fi works after these steps, the problem was temporary. But if not, we'll move on to more serious measures. Please note: if your router uses dual-band mode (2.4 GHz + 5 GHz), try selecting the network manually 2.4 GHz - some models Samsung A5 work poorly with 5 GHz due to outdated drivers.

2. Reset network settings: when your phone "forgets" Wi-Fi

One of the most common reasons is network settings conflictOver time, connection errors, DNS cache, and invalid IP addresses accumulate in the system. These can be reset without losing personal data:

1. Open Settings → General Management → Reset → Reset Network Settings.
2. Confirm the action (you may be asked to enter a PIN or pattern).
3. After rebooting, try connecting to Wi-Fi again.

This method helps in 60% of cases when Samsung A5 It sees networks, but doesn't connect or constantly "loses" them. If the problem persists after a reset, check IP settings:

• Tap and hold the name of your Wi-Fi network in the list of available networks.
• Select Manage network settings → Advanced.
• In the section IP settings try changing DHCP on Static and enter manually:
  • IP address: 192.168.1.100 (the last digit can be any number from 100 to 254)
  • Gateway: 192.168.1.1 (standard for most routers)
  • Network prefix length: 24
  • DNS 1: 8.8.8.8 (Google DNS)

3. Firmware issues: updates, crashes, and rollbacks

Samsung Galaxy A5 models from 2015–2017 are particularly sensitive to firmware updates. After installing new versions of Android (for example, from 7.0 to 8.0), the Wi-Fi module may stop working due to driver incompatibility. If the problem appeared immediately after the update, there are two options:

1. Firmware rollback (if you are sure that everything worked before). For this you will need a computer, a program Odin and the original firmware for your model. Attention: Incorrect rollback can brick your phone!
2. Manual patch installationSometimes Samsung releases patches for specific models. Check for updates at Settings → Software Update.

If you are not ready to risk the firmware, try clear the system cache:

1. Turn off your phone.
2. Clamp Power button + Volume up + Home (for A5 2015–2016) or Power button + Volume up + Bixby (for A5 2017).
3. On the menu Recovery select Wipe cache partition (control with volume buttons, confirmation with power button).
4. Restart your phone (Reboot system now).

This procedure will not reset your settings, but will delete temporary files that may be blocking Wi-Fi.

What should I do if after an update Wi-Fi turns on but doesn't connect to any networks?

This may be due to file corruption. wifi.config in the system partition. In this case, only a reflash or manual file recovery via ADB (root access required) will help.

4. Hardware problems: how to test the Wi-Fi module

If software methods do not help, the problem may lie in physical damage Wi-Fi module or antenna. Typical symptoms:

• 🔍 The phone doesn't detect it not a single one Wi-Fi networks (even in places with a strong signal).
• 📉 The signal level constantly "jumps" from 3-4 divisions to 0.
• 🔌 Wi-Fi turns on, but turns off on its own after 5-10 seconds.
• 🔥 The phone overheats in the upper part (where the Wi-Fi module is located).

For diagnostics:

1. Check the SIM tray: on some models Samsung A5 The Wi-Fi antenna is located near the SIM card tray. If it is damaged or installed incorrectly, the signal may be lost.
2. Inspect the body: Cracks or dents in the top of the phone (where the antenna is located) often lead to broken contacts.
3. Test in safe mode:
   1. Press and hold the power button → hold your finger on Turn off → click Safe mode.
   2. In this mode, all third-party apps are disabled. If Wi-Fi works, the software is to blame (possibly a virus or app conflict).

If the problem is hardware related, the repair will cost 1,500–3,500 rubles (Wi-Fi module or antenna replacement). Disassembling the phone yourself is not recommended, as it can damage cables or microchips.

5. Application conflicts and viruses

Sometimes Wi-Fi is blocked energy optimizers, VPN clients, or viruses. For example, applications like DU Battery Saver or Clean Master They can aggressively disable background processes, including Wi-Fi. This is easy to check:

1. Remove all apps that "clean" and "speed up" your phone (they often do more harm than good).
2. Check app permissions:
   • Go to Settings → Applications.
   • Sort by Permissions and find those that have access to Wi-Fi or Connections.
   • Revoke permissions from suspicious programs.

Scan your phone for viruses using Malwarebytes or Dr.Web Light.

Pay special attention VPN programs (For example, Turbo VPN, Psiphon). They can redirect traffic through their servers, causing the Wi-Fi to appear to connect, but the internet isn't working. Try disabling the VPN or uninstalling the app.

6. Power Saving Settings: Why Wi-Fi Turns Off While Sleeping

Samsung Galaxy A5 is known for its aggressive battery optimizations, which can automatically turn off Wi-Fiwhen the screen is off. To fix this:

1. Go to Settings → Device Maintenance → Battery → Battery Settings.
2. Click on the three dots in the upper right corner → Always-on applications.
3. Add to the list applications that should maintain the connection (for example, WhatsApp, Telegram, YouTube).
4. Turn it off Adaptive battery And Battery optimization for Wi-Fi (if such options are available in your firmware).

Also check Wi-Fi sleep mode:

1. Open Settings → Connections → Wi-Fi → Advanced (or Three dots → Advanced settings).
2. Find the option Connect to Wi-Fi while you sleep and select Always.

If these settings are missing, they are hidden in your firmware version. In this case, only manual editing of the configuration file through ADB (knowledge and computer required).

7. Alternative solutions: from lag to phone replacement

If none of the above helps, consider these options:

• 🔄 Factory reset: a radical method, but helps in 10-15% of cases. Attention: Back up your data!
• 📡 External Wi-Fi adapter: for models with support OTG You can connect a USB Wi-Fi adapter (for example, TP-Link TL-WN725N).
• 🔧 Replacing the Wi-Fi module: If your phone is older than 5 years, it is sometimes cheaper to buy a new one than to repair it.
• 📱 Upgrading to a new phone: Samsung A5 is outdated and its hardware limitations may not be able to handle modern Wi-Fi standards (e.g. 802.11ac).

If you decide to perform a factory reset, here are the step-by-step instructions:

1. Save all important data (photos, contacts, messages).
2. Go to Settings → General management → Reset → Factory data reset.
3. Confirm the action and wait for the reboot.
4. After reset do not restore data from a backup — First, check your Wi-Fi. If it works, the problem was software-related.

FAQ: Frequently asked questions about Wi-Fi on the Samsung Galaxy A5

My Samsung A5 sees networks but won't connect—it says "Saved," and the internet isn't working. What should I do?

This is a typical problem with IP or DNS settings. Try:

1. Forget network (Wi-Fi Settings → Network Name → Delete).
2. Reconnect by selecting manually Static IP (see section 2).
3. If it doesn't help, reset the network settings (Settings → General Management → Reset → Reset Network Settings).

The Wi-Fi works, but the speed is very slow (1-2 Mbps). What's wrong?

The reasons may be different:

• 📶 Weak signal: check the level in Wi-Fi settings (if 1–2 divisions, move closer to the router).
• 🔄 Router overload: reboot it and disconnect unnecessary devices.
• 🛠️ Restriction from the provider: Call your internet provider's support team.
• 📱 Phone limitation: check if it is turned on Traffic saving mode (Settings → Connections → Data Usage).

After I dropped my phone, my Wi-Fi stopped working. Is this a hardware issue?

Most likely, yes. The fall could have damaged:

• Wi-Fi antenna (a thin conductor running from the module to the housing).
• Wi-Fi module (microcircuit on the motherboard).
• Loop contacts (if the phone was disassembled earlier).

Try connecting to Wi-Fi in safe mode (See section 4). If that doesn't help, take it to a service center.

Can I fix Wi-Fi on a Samsung A5 myself?

Self-repair is only possible if you:

• Have experience using a soldering iron (for replacing an antenna or module).
• You can carefully disassemble the phone without damaging the cables.
• Found an original Wi-Fi module for your model (for example, BCM4339 for A5 2017).

In other cases, it's better to contact a service center—the cost of repairs (1,500–3,500 ₽) is usually lower than the risk of permanently breaking the phone.

My Wi-Fi works, but it disconnects after 5-10 minutes. How do I fix it?

This is related to energy saving settings. Try:

1. Disable Adaptive battery (Settings → Device Maintenance → Battery → Battery Settings).
2. Add frequently used apps to Always active (see section 6).
3. Disable Optimize Wi-Fi in sleep mode (in advanced Wi-Fi settings).

If it doesn't help, the problem may be in Wi-Fi driverTry rolling back the firmware (see section 3).