Search guides

Fix a phone that is slow

We'll free storage, install updates, and reduce background load—or tell you when to call a pro.

Troubleshooting · Home electronics
10–30 min
Step 1 of 7

Quick triage — pick your path

Get started

Choose the option that matches what you see. You can jump straight to that section.

Show full guide

Steps

Goal: Free storage, install updates, and reduce background load to improve performance.

  • Check storage. If under 1–2 GB free, the phone will slow down.
  • Good: At least 1–2 GB free. Proceed to Install updates.
  • Bad: Free storage first—delete apps, photos, cached data.

Check storage

Goal: Confirm adequate free space.

  • Open Settings, Storage (or iPhone Storage). Delete unused apps, photos, videos. Clear app caches. Empty recently deleted. Aim for at least 1–2 GB free.
  • Good: Storage freed. Restart and test.
  • Bad: Continue freeing space or proceed to updates.

Install updates

Goal: Confirm the OS is up to date.

  • Settings, General, Software Update (iPhone) or Settings, System, Software update (Android). Install any pending updates. Restart after updating.
  • Good: System up to date. Proceed to Close apps and clear caches.
  • Bad: Install updates first—outdated OS can cause lag.

Close apps and clear caches

Goal: Reduce memory and cache usage.

  • Close background apps from the app switcher. Settings, Apps—clear cache for heavy apps. Uninstall unused apps.
  • Good: Fewer apps and caches cleared. Force restart.
  • Bad: Close apps and clear caches before restarting.

When to get help

Call a technician if:

  • Factory reset does not help.
  • The phone has adequate storage but is still slow.
  • The device is several years old and may need replacement.

Verification

  • At least 1–2 GB free storage.
  • OS is up to date.
  • Fewer background apps and cleared caches.
  • Phone feels more responsive after restart.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Storage Free at least 1–2 GB; delete unused apps and cached data.
  2. Updates Install pending OS updates; restart.
  3. Apps and restart Close background apps; clear caches; force restart.
  4. Factory reset Factory reset if still slow—back up data first.
  5. Call a pro Factory reset does not help; device may be too old.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Phone model and OS version
  • Storage used and free
  • Number of installed apps
  • Steps already tried

Is storage nearly full (under 1–2 GB free)?

Phones slow down when storage is nearly full. Check Settings, Storage.

Open Settings, Storage (or iPhone Storage). Check free space. Under 1–2 GB: free storage—delete apps, photos, cached data. Over 1–2 GB: check updates and apps.

Yes No

You can change your answer later.

Free storage

Delete unused apps, photos, videos. Clear app caches. Empty recently deleted. Aim for at least 1–2 GB free. Restart. If still slow, check updates and close background apps.

Done

Are there pending OS updates?

Outdated OS can cause lag. Check Settings, Software Update.

Settings, General, Software Update (iPhone) or Settings, System, Software update (Android). Install any pending updates. Restart after updating. Good: up to date—close apps and restart. Bad: install updates first.

Yes (up to date) No (pending)

You can change your answer later.

Install updates

Install pending OS updates. Restart. If still slow, close background apps and clear caches.

Done

Do you have many apps open or installed?

Too many apps in memory or installed can slow the phone.

Close background apps from the app switcher. Uninstall unused apps. Clear caches for heavy apps. Good: fewer apps—force restart. Bad: close apps and clear caches first.

Yes No

You can change your answer later.

Close apps and clear caches

Close background apps. Clear app caches in Settings, Apps. Force restart. If still slow, factory reset (back up first).

Done

Force restart or factory reset

Force restart: iPhone—Volume Up, Volume Down, hold Side button. Android—Power + Volume Down. If still slow, factory reset (back up first). If factory reset does not help, the phone may be too old—call a technician.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a phone be slow?
Storage nearly full, pending OS updates, too many background apps, or app cache buildup. Free storage and install updates first.
Can I fix a slow phone myself?
Yes. Free storage, install updates, close background apps, clear caches, and force restart. Factory reset if needed—back up data first.
When should I call a technician for a slow phone?
If factory reset does not help and the phone has adequate storage. The device may be too old for current OS or have hardware issues.

Rate this guide

Was this helpful?

Continue to