The two biggest wins are freeing storage (Solution 1) and restricting apps running in the background (Solution 3). An Android above 90% full slows down on its own, regardless of the hardware. If the slowness started suddenly, suspect an app installed or updated recently (Solution 4). And ignore "booster" apps: they take up memory to do what Android already does better.
What causes this problem
- Storage nearly full - Android needs free space to work and slows considerably above 90% usage.
- Apps running in the background, syncing and using memory without being open.
- One badly optimised app, installed or updated recently.
- Not enough RAM for the number of apps you keep using at once.
- System animations, which cost more than they appear to on entry-level phones.
- A worn battery: some phones throttle the processor when the battery can no longer deliver the current needed.
- Restart the phone first. Devices that go weeks without a reboot accumulate stuck processes, and that alone resolves a share of cases.
- Check free space under Settings > Storage. If it is over 90% full, fix that before anything else.
- Try to pin down when it started: suddenly, after installing something, or gradually? That changes the path.
- Note how much RAM the device has. With 3 GB or less, part of the slowness is a genuine hardware limit.
Solutions, in the order to try them
1Free up storage space
This is the highest-impact step, and the most overlooked. Android uses free space for temporary files and for reorganising data; without headroom, everything slows down, even on good hardware.
- Open Settings > Storage and see what takes the most space.
- Clear the cache of your heaviest apps under Settings > Apps, one by one.
- Back up photos to Google Photos and use Free up space on this device.
- Uninstall apps you have not opened in months.
- Leave at least 15% of storage free.
2Find out which apps consume the most
Before changing settings, it is worth knowing what is weighing things down. Often it is a single app, and fixing it fixes everything.
- Under Settings > Battery > Battery usage, see which apps consume most - heavy consumption usually tracks processor use.
- Under Settings > Apps, sort by size to see which take the most space and data.
- Compare against your actual usage: an app you barely open showing at the top is the prime suspect.
3Restrict what runs in the background
Apps staying active while not open are the second biggest source of slowness. Restricting them gives memory and processor back to what you are actually using.
- Open Settings > Apps, choose the app and tap Battery.
- Select Restricted for the ones you rarely open.
- Under Mobile data and Wi-Fi, turn off background data for those same apps.
- Use Optimised rather than Restricted for messaging apps - restricting delays their notifications.
4Investigate a recent install or update
If the phone was fast and slowed down from one week to the next, there is almost always a new or updated app behind it.
- In the Play Store, open Manage apps and device and see what installed or updated recently.
- Uninstall anything you added around the date the slowness began and do not genuinely use.
- For an important app that turned heavy, uninstall its updates or reinstall it.
- Test the phone in Safe mode, which starts with factory apps only: if it is fast there, the problem is an installed app.
5Reduce system animations
Animations do not make the device faster, but they make the interface feel instant - and on entry-level phones the difference is real, not just perceived.
- Enable Developer options: under Settings > About phone, tap Build number seven times.
- Go back and open System > Developer options.
- Find Window animation scale, Transition animation scale and Animator duration scale.
- Change all three from 1x to 0.5x - or Off, if you prefer no animation at all.
6Update the system and tidy the home screen
Updates bring performance fixes, and a home screen full of widgets costs something on every unlock.
- Install anything pending under Settings > System > System update.
- Remove self-refreshing widgets (weather, news, social) from the home screen.
- Use a static wallpaper instead of a live one.
- Reduce the number of home screens and shortcuts.
7Consider a factory reset - with a backup first
If nothing above worked and the phone has years of use, a reset restores the original software performance. It is laborious, so leave it for last.
- Back up photos, contacts, WhatsApp and documents, each through its own route.
- Go to Settings > System > Reset options > Erase all data.
- After resetting, reinstall only the apps you genuinely use.
- If the slowness returns with few apps installed, the limit is hardware, not software.
Applies to
| System | Status |
|---|---|
| Android 12 to 15 | Confirmed |
| Android 9 to 11 | Confirmed |
| Samsung, Xiaomi and Motorola | Their own layers (One UI, MIUI) change menu names, not the steps |
Menu names can change slightly between versions. If a step above does not match what you see on screen, the official support page from the manufacturer has the most current wording for your version.
Frequently asked questions
Last checked: Aug 31, 2026 · We review this guide whenever the manufacturer changes the process.