Why the Internet does not work on Android, although everything is connected: full analysis

Do you see the icon 4G/5G or Wi-Fi in the status bar, but the pages do not load, and applications show the error “No Internet connection”? This problem is familiar to millions of users, from budget ones to flagship ones. The reasons may lie in both banal settings and hardware faults. In this article we will analyze Android - from budget Redmi to flagship Samsung Galaxy. The reasons may lie in both banal settings and hardware faults. In this article we will look at all possible scenariosincluding rare cases that are not written about in standard instructions.

The peculiarity Android is that the problem with the Internet is often disguised as “everything is working”: the network indicator is on, IP address assigned, but there is no traffic. We analyzed 12 key reasons —from errors APN to conflicts VPN —and collected them into a checklist with step-by-step solutions. Important: some methods (for example, reset DNS) work only on certain versions Android (from 10 to 14), so we will indicate the nuances for each.

1. Problems with APN: why mobile data does not work when connected

Access Point APN (Access Point Name) is a “bridge” between your smartphone and the operator’s network. If the settings APN are incorrect or outdated, the device will show a network signal, but the Internet will not work. Most often this happens after:

• 🔄 Firmware updates Android (especially on Xiaomi, Realme, Oppo)
• 📱 Change of SIM card or operator (for example, switching from MTS on Tele2)
• ⚡ Reset network settings (Reset network settings)

To check APN, go to Settings → Mobile network → Access points (APN). If the list is empty or there are several profiles - the problem is obvious. Solution:

1. Delete all existing APN profiles (click on each and select “Delete”)

2. “Create a new APN” or “Add”

3. Enter your operator’s details (see table below)

4. Save and reboot your smartphone

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Operator	APN name	APN	Authentication type
MTS	mts	internet.mts.ru	PAP
Beeline	beeline internet	internet.beeline.ru	PAP
MegaFon	Megafon	internet	None
Tele2		internet.tele2.ru	PAP

⚠️ Attention: On some firmware (for example, ColorOS on Oppo/OnePlus) menu APN may be hidden. To open it, enter the code in the dialing field ##4636##, then select “Phone information” → “APN settings”.

2. VPN and proxy conflicts: why there is Internet, but sites do not open

VPN services (for example, NordVPN, ProtonVPN) and proxy servers can block traffic even after disconnection. Symptoms:

• 🌐 Google, YouTube open, but other sites do not
• 📱 Applications like Telegram or WhatsApp work, but the browser does not
• ⚡ An unknown person has appeared in the settings Wi-Fi or mobile network proxy

Check:

1. Open Settings → Network and Internet → VPN and delete all saved profiles.
2. In the settings Wi-Fi (click on the network name) check the "Proxy" field - it should be No.
3. Run browser in incognito mode (to exclude extensions).

Yes, always|Only for certain sites|No, I don’t use|Tried, but deleted-->

If the problem persists, reset your network settings:

Settings → System → Reset → Reset Wi-Fi, mobile network and Bluetooth settings

⚠️ Attention: On Android 12+ some VPNs (for example AdGuard) create a virtual TUN interfacethat may conflict with system services. After removing the VPN, reboot the device in safe mode (hold down the power button → “Reboot in safe mode”).

3. DNS errors: sites do not open, but instant messengers work. If

System DNS (Domain Name System) converts website addresses (for example, google.com) V IP-addresses. If DNS-servers of the operator or Wi-Fi-routers are not responding, you will see an error like “DNS_PROBE_FINISHED_NXDOMAIN” or “DNS Server is not responding.” At the same time:

• 📶 mobile data or Wi-Fi connected
• 📱 WhatsApp, Viber work (they use IPaddresses directly)
• 🌐 Browsers and most sites - no

How to check:

1. Open 1.1.1.1 in a browser. If the page has loaded, the problem is DNS.
2. Install the application DNS Changer (for example, 1.1.1.1: Faster Internet from Cloudflare) and turn it on.

Manual DNS setup (for Wi-Fi):

1. Go to Settings → Wi-Fi, click on your network → “Change network” → “Advanced settings”.
2. In the “IP Settings” field, select Static.
3. In the fields DNS 1 i DNS 2 enter:

   8.8.8.8
   8.8.4.4

   (this is DNS from Google) or

   1.1.1.1
   1.0.0.1

   (this is DNS from Cloudflare).

4. Background traffic limits and data saving

Android aggressively limits background traffic when saving mode is enabled. Signs:

• 📱 Applications do not update in the background (for example, Gmail does not receive emails)
• 🎵 Music in Spotify or YouTube Music is interrupted
• 📲 Notifications arrive with a delay (for example, in Telegram or VK)

Check:

1. Settings → Network and Internet → Data transfer → Traffic saving —turn it off.
2. For individual applications: Settings → Applications → [Select application] → Mobile data → Allow background data transfer.
3. On Samsung: Settings → Device maintenance → Battery → Adaptive battery mode —add the required applications to exceptions.

⚠️ Attention: On Xiaomi (firmware MIUI) there is a hidden limitation for applications running in the background. To remove it, go to Settings → Applications → Manage applications → [Select application] → Battery → Unlimited.

5. Problems with the firmware or modem

If the Internet stops working after updating Android or modem firmware, it's your fault software failure. This is a common problem on:

• 📱 Samsung Galaxy after updating to One UI 6 (Android 14)
• 📱 Xiaomi Redmi/Poco when switching to HyperOS
• 📱 Devices with custom firmware (LineageOS, Pixel Experience)

How diagnose:

1. Check the modem version: enter in the dialing field ##4636## → "Phone information" → look at the line Baseband version. If there Unknown the modem does not work.
2. Install the application Network Signal Guru and check the parameter RRC State. If it Idle the network is not active.

Solutions:

• 🔄 Reflash the modem (find file modem.bin for your model on 4PDA or XDA Developers).
• 📥 Rollback to the previous firmware version (if the problem started after the update).
• 🛠️ Reset to factory settings (make a backup first!).

How to reflash a modem on Samsung

1. Download the firmware for your model from the site Sammobile or Frija.

2. Unpack the file AP_[model]...tar.md5 using 7-Zip.

3. Find the file inside modem.bin and flash it through Odin to slot CP.

4. Reboot your phone.

6. Hardware faults: from antenna to SIM card

If none of the software methods helped, the problem may be in iron. Common causes:

• 📶 Damaged antenna (for example, after a fall or moisture)
• 🔌 Oxidized contacts SIMcard or slot
• 🔋 Faulty modem (often on MediaTekchips after overheating)

How to check:

1. SIM card test: Try it in another phone. If the Internet works, the problem is in your device.
2. Checking the antenna: Enter ##4636## → “Phone information” → look Signal Strength. If the value -120 dBm or lower, the antenna does not catch the network.
3. Modem diagnostics: Connect the phone to the PC and check the logs via ADB:

   adb logcat | grep -i "ril"

   If there are errors type RIL_REQUEST_DATA_CALL_LIST Failed —the modem is faulty.

Symptom	Probable cause	Solution
The Internet only works next to the window	Weak antenna signal	Replacing the antenna module
SIM card is not detected	Oxidation of slot contacts	Cleaning with alcohol or replacing the slot
mobile data works, Wi-Fi does not	Wi-Fi module malfunction	Module replacement or firmware

⚠️ Attention: On Androiddevices with a chip MediaTek (for example, Redmi Note 10, Realme 8), the modem may “fly off” after severe overheating. If the phone was warming up before the internet went out, let it cool for 1-2 hours, then reboot. If it doesn’t help, a flashing or repair is required.

7. Blocking by the operator: restrictions, debts, roaming

The operator can limit access to the Internet for several reasons:

• 💰 Unpaid bill (even if the balance is positive, there may be hidden debts)
• 🌍 Roaming (some tariffs block the Internet for border)
• 📵 Fair Use limit (for example, after exhaustion of high-speed traffic)

How to check:

1. Call the operator (numbers: MTS — 0890, Beeline — 0611, MegaFon — 0500, Tele2 — 611).
2. Send a USSD request to check your balance and restrictions:

   *100# - MTS
   *102# - Beeline
   *105# - MegaFon
   *155# - Tele2

3. Check your personal account on the operator’s website (section “Services” or “Restrictions”)

FAQ: Frequently asked questions about problems with the Internet on Android

🔍 Why on Android it says “Connected without access to the Internet”?

This error means that the device connected to Wi-Finetwork or mobile network, but did not receive IP address or DNSCheck:

1. Settings IP in Wi-Fi (should be DHCP, not static IP).
2. Reboot the router (if the problem is with Wi-Fi).
3. Disable VPN/proxy.

📶 Why does 4G/5G connect, but the speed is the same as 2G?

Reasons:

• The operator has limited the speed (check tariff).
• The network is overloaded (especially during rush hour).
• The mode selected in the network settings is Only 3G (Settings → Mobile network → Network mode).
• Traffic saving mode is activated.

🔄 Why did the Internet disappear after resetting the settings?

Resetting deletes the settings APN i Wi-FiSolution:

1. Configure APN manually (see Section 1).
2. Connect again to Wi-Fiby entering the password.
3. Check whether the "B" mode is enabled on an airplane."

🛠️ Is it possible to repair the antenna yourself?

If the problem is in the contacts of the SIMcards - yes: carefully clean them with an eraser or alcohol. If the antenna itself is damaged (for example, after a fall), professional repair is required. data-i="303">there are guides on replacing the antenna module for popular models (for example, iFixit There are guides on replacing the antenna module for popular models (for example, Samsung Galaxy S22 or Xiaomi Redmi Note 11).

📵 Why does the Internet work on the second phone, but not on this one?

Probable reasons:

• Your phone is faulty settings APN.
• Activated VPN or proxy.
• IMEI your device is blocked by the operator (check via *#06#).
• The modem or antenna is faulty.