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Android phone keeps on restarting: the causes & solutions


Constant unscheduled restart of an Android smartphone is an annoying error. It puts you in a bad mood and generates a desire to say goodbye to the gadget. A quick and effective solution in such case is paying a visit to a service center providing free diagnosis. But you may not always have time for this, so first let's give a try to fixing the problem on your own.

Table of Contents

How does the error look like

Phone restarting on its own may occur in the following way:

  1. The charge of the battery of your phone is enough, but an instant complete discharge of it happens and it's followed by the reboot of the device;
  2. The phone loses its battery charge faster than usual, after which a similar case happens. For some time, you smartphone can turn on again with the charge of 3-5% and right after it "goes into oblivion".

Quick methods of getting rid of incorrect restart

Your phone may often restart while being charged. In such case, we recommend using a "native" charger. Other type of failure is shutting off after installing/replacing a SIM or SD card. You have to change and / or perform a reflashing (update) of your Android OS.

Sometimes your device can switch off/on in the cold which is a short-term phenomenon. After entering a warm place the problem is solved.

Other kind of problem is disconnecting and returning to the previous state during a call or conversation. In such case, you can try disabling 3G network, resetting settings or changing your SIM-card, especially if it's of Micro-SIM or Nano-SIM format.

Why does your phone restarts on its own?

There can be plenty of reasons for a sudden reboot:

  • viruses,
  • mechanical damage,
  • software failure,
  • the problem with "iron",
  • sticking of the power key due to the improper operation of a device.

Before taking serious steps we advise going through the easier ones such as checking your phone for viruses or replacing its battery.

Note! If the power key is stuck (which is possible if you constantly press it with wet or sweaty hands), wipe it together with the contact points of the charger with a nail-polish remover without acetone, or better – soak them for 20-30 minutes in a solution.

Let's talk about the ways to resolve common problems causing a phone to crash. They can be performed on your own.

Getting a virus

Smartphone isn't a device just for communication and entertainment, it can be a real "bank in a pocket". With it you can pay for purchases, make transactions with cards and accounts, etc. Not surprisingly frauds regularly come up with new ways to steal data.

So, in order to check your device for viruses:

  1. Download an antivirus from Google Play, if you haven't done it before. We recommend using Dr.Web, AVG AntiVirus or Malwarebytes. You can see other options here.
  2. Run the antivirus and perform a full scanning.

Kaspersky Internet Security is a very well-known one with good reputation, so let's talked about the process based on it.

Tap "Scan" on "Ready to scan" screen.

Select the type of scanning: "Full", "Fast" or "Folder" if needed. In the first case the whole smartphone is scanned, in the second — installed apps and in the third — the folder a path to which you've specified.

Wait for the scanning to finish.

If any viruses are found, remove them.


  • You can scan a memory card for viruses by connecting it to a computer via a card reader;
  • In order to achieve the best result, select "Real-Time Protection" from the sidebar menu and pay for the service (€1.99 per month / €10.95 per year).

Battery discharges

The battery can't last forever. With time or due to improper use of it your battery may wear out and as a result of it will need to be changed.

Replacement of a battery

It can be easily replaced in case it's a removable one. Buy a new one and replace the old with it, remember to pre-check its adjoining (for poor contact) and inspect it for any kind of deformation.

If your battery can't be removed, bring to a service centre for replacement or, if the period of warranty service hasn't expired yet, bring it to a specialized center where your battery will be replaced free of charge.

Calibrating a battery

It's not always necessary to change your battery immediately when your phone restarts on its own. Sometimes the only thing that is required is calibrating its battery. In order to do this:

  1. Discharge your phone completely, then turn it on again and wait for it to turn off;

  2. Insert a charger into a connector and leave the smartphone until it's fully charged (don't turn it on);

  3. Disconnect the charger and turn on your phone. If it isn't charged enough, reconnect the charger until the battery is completely full (100%);

  4. Disconnect the charger and reboot the device. If it still lacks charge, reconnect your phone to the power network. Keep on doing it until the charge level reaches 100%;

  5. Repeat the steps 1 and 2.

A failed software update

An Android phone can often crash due to the failure of software. In order to fix such problem, you can roll back your smartphone to the factory settings or update its firmware.

Installing an update

Go to the "Settings";

Select "Software update";

Wait for the process to finish. If any update is found, install it (tapping on "Download and install").

Hard reset

Resetting (also know as Hard Reset) involves a complete data removal, so first of all you should copy all your data to a computer and, in addition to it, delete (i.e. disable) your Google account.

Hard Reset is performed in the following way:

  1. Go to Android OS Settings, then tap on "General management";
  2. Select Reset > "Reset settings" (or "Factory data reset");
  3. Wait for the process to finish. Re-configure the system.

Mechanical damage

A constant shut off could be triggered after you drop your phone/hit your classmates with it/use it as a sports equipment. Which can lead to the damage of its printed-circuit board. A complete replacement or re-soldering of its elements might be required.

If none of the above mentioned methods help you to fix the problem, there is a high possibility that a constant reboot of your phone is caused by a mechanical damage. In such case, you have only one option which is to bring your phone to a repair service.

By the way, your phone might also be constantly rebooting due to a factory defect. You have the right to terminate the sale agreement and demand a refund or replacement of the goods. In any case, the decision will be made after a thorough examination. In the meantime, read the law "On consumer protection", pay special attention to the section on the return of technically complex goods.

Ilia is a professional writer. He has expert knowledge in GPS and cartography with 15 years of experience. Additionally, Ilia has extensive experience in data recovery on PC and mobile. He started his career as a journalist by reviewing PC and mobile apps. His current responsibilities are to keep track of users' questions on MGT and answer them.