How to improve mobile Internet on Xiaomi Redmi Note 9 Pro: Full Guide 2026

Xiaomi Redmi Note 9 Pro is still one of the most popular smartphones of the middle class, but many users face the problem of slow mobile Internet, whether the speed of 4G leaves much to be desired, whether the connection is constantly interrupted, or the smartphone stubbornly clings to 3G instead of LTE. The reasons can be a dozen — from incorrect settings to hardware malfunctions.

In this article, we will look at all the possible ways to improve mobile Internet on the Redmi Note 9 Pro (models M2003J6A1G, M2003J6B1G, M2003J6C1G and other modifications). No water, only proven methods with explanations of why they work. And if you have tried something from the list, vote in the poll below to understand what problems are most relevant.

1. Check the basic network settings

Before digging deeper, make sure you have the network mode set up correctly. Often users are unaware that their smartphone is running in 3G mode instead of 4G (LTE) due to randomly altered settings.

How to check:

• 📱 Open the Settings. → SIM-maps and mobile networks.
• 🔄 Choose yours. SIM-card (if there are several).
• 📶 Click Network Type and install 4G (preferably LTE/3G/2G (motor-car).
• 🔄 Restart your smartphone – sometimes changes only apply after a reboot.

If the 4G option is not available or in gray, it could mean:

• ❌ Yours. SIM-card does not support LTE (check with the operator).
• ❌ There is no coverage in your area. 4G (Check the coverage map on the operator’s website).
• ⚠️ Hardware problem with communication module (more on that later).

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If you have two. SIM-Try to temporarily disable the second card – sometimes a conflict between operators leads to a drop in speed.

2.APN setup: why it's important and how to do it right

APN (Access Point Name is your operator's "entry point" to the Internet. APN If you're lost or outdated, you can drop speeds, or you can even go abyss. APN Sometimes reset after updates or changes SIM-map.

How to set up your APN manually:

1. Go to Settings. → SIM-maps and mobile networks → [yours SIM] → Access points (APN).
2. Click on the three dots in the top right corner and select the New Access Point.
3. Enter your operator’s parameters (see table below).
4. Save the settings and restart the phone.

Important: If you manually set up an APN, delete all other access points except the one you created. Sometimes conflict between multiple APNs leads to crashes.

3. Update of firmware and modems

Manufacturers regularly release updates that fix modem bugs. On the Redmi Note 9 Pro, it is especially important to monitor the version of the radio firmware (modem part), as it directly affects the quality of communication.

How to update:

• 🔄 Go to Settings. → The phone. → Updating the system.
• 🔍 Click on the three dots in the top corner and select Update modem package (if there is such a item).
• 📥 If there are no updates, check the Baseband version in Settings. → The phone. → Version. MIUI. The latest stable version for the Redmi Note 9 Pro — V12.5.7.0.RJWMIXM (It may differ depending on the region).

If there have been no official updates for a long time, but the problems with the Internet have appeared recently, try to roll back to the previous version of MIUI:

Download the stable version MIUI Xiaomi|Make a backup copy of the data|Go to Settings. → The phone. → Updating the system → Three points. → Select a Service Package|Select the downloaded file and confirm the rollback-->

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If the speed has dropped after updating the modems, try resetting the network settings (see section 5).

4.Verification SIM-card-slot

Sometimes the problem is not in the phone, but in the physical condition. SIM-For example, if the contacts are oxidized or the card is not tightly attached, the connection will be unstable.

What to do:

• 🔍 Get it. SIM-map and inspect it for scratches, chips or oxidation.
• 🧹 Clean the card and slot contacts in your phone with soft rubber washing gum (do not use alcohol or metal objects!).
• 🔄 Try inserting. SIM-card to another slot (if you have a Redmi Note 9 Pro with two slots).
• 📱 Check the card on another phone – if there’s the same problem, contact the operator for a replacement.

⚠️ Note: If after cleaning the contacts, the phone stopped seeing SIM-Check if the contacts in the slot have been bent, and if they do, you'll need repairs at the service center.

Also worth considering is that the Redmi Note 9 Pro supports VoLTE (LTE voice), but if this feature is disabled, the phone can switch to 3G more often.

• Go to Settings. → SIM-maps and mobile networks → [yours SIM] → Enable VoLTE.
• If there is no option, update the firmware or contact the operator to activate the service.

5. Reset network settings and cache

Over time, temporary files and incorrect settings accumulate in the system, which can interfere with the stable operation of the mobile Internet, and resetting network settings often helps to return speed to the previous level.

How to reset:

1. Open Settings → System and device → Additional → Resetting.
2. Select Network Reset (not to be confused with a full reset!).
3. Confirm the action and restart the phone.

After discharge:

• ✅ You will have to re-enter the Wi-Fi password.
• ✅ Settings APN They will be reset to the factory (they will need to be reconfigured, as in section 2).
• ✅ Bluetooth devices will disconnect (you will have to connect them again).

If the reset didn’t help, try clearing the cache of system applications:

• Go to Settings → Applications → Application Management.
• Find Settings (application with the gear icon) and click Clear Cache.
• Do the same for Phone and SIM card applications.

6.Verification and system optimization

It is unlikely, but possible: some viruses or “optimizers” can intercept traffic or limit Internet speed, and background processes can load a channel, making communication seem slow.

How to check:

• 🛡️ Install an antivirus (such as Dr.Web or Kaspersky) and scan the system.
• 📊 Open the Settings. → Battery and productivity → Battery usage and see which apps are consuming traffic in the background.
• ⚡ Turn on Power Saving Mode (in the same battery settings) and check if the speed has changed. If so, then the problem is with the background activity of the apps.

If you suspect a particular application:

• Go to Settings → Applications → [app name] → Mobile traffic.
• Turn off Background Data Use.
• If it’s not a system application, try removing it.

⚠️ Note: Some Google Play “Internet Speed” apps slow down communication by adding a proxy or a proxy. VPN. Remove them if you have installed them.

7. Hardware problems: when to carry in the service

If none of the above methods helped, perhaps the problem is hardware. On the Redmi Note 9 Pro, the most common are:

• 📡 Damage to the antenna module (for example, after falling or getting moisture).
• 🔌 Malfunction SIM-connector (contacts are drained or oxidized).
• 🔋 Power problems with the modem (for example, bloated capacitors on the board).

How to diagnose:

• Try inserting another one. SIM-If the problem persists, it's the phone.
• Check how the Internet behaves in different places (home, on the street, in another city), if everywhere is equally bad, most likely a hardware malfunction.
• Note the network indicator: if it flashes frequently or shows H+ instead of 4G, it could be a problem with the antenna.

Cost of repair in the service center:

⚠️ Warning: If the phone has been in water or dropped, don't try to disassemble it yourself, it could cause more damage.

FAQ: Frequent questions about mobile Internet on Redmi Note 9 Pro