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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →An old phone or tablet can still earn its keep as a dedicated casting handset, music player, camera monitor, power source, mouse, control panel, display, or remote. The practical limit is not age alone: the device must have usable hardware, a compatible operating system and apps, and a connection method that fits the job. Tablets can do many of the same tasks, but their ports, cameras, batteries, screens and app support vary widely by model.
Start with the role that matches what still works. A phone with a good camera but a tired battery may suit a stationary monitor; one with a reliable battery and Bluetooth may be better as a music player. If the operating system no longer receives security updates, avoid exposing the device to accounts, cameras, microphones or sensitive data unless you can keep the task offline.
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Check the device before choosing a use
Make a quick inventory before installing anything. This prevents building a setup around a feature your model does not support.
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- Hardware: Test the screen, touchscreen, camera, microphone, speakers, Bluetooth, Wi-Fi, charging port and battery. A swollen battery, overheating or a damaged charging connector is a reason to stop using the device.
- Connectivity: Decide whether the task needs Wi-Fi, a phone hotspot, Bluetooth, a cable or no network at all.
- Accounts and data: Check whether the role requires a service account, cloud access, location permission, camera access or microphone access.
- Placement: For a permanent setup, confirm that the device can stay safely ventilated and that the connector and dimensions match any stand or cable you intend to use.
| Repurposing idea | Hardware to verify | Typical connection | Main exposure or limitation |
|---|---|---|---|
| Dedicated casting handset | Working screen, Wi-Fi, supported casting app | Wi-Fi | App and operating-system support may end |
| Bluetooth music player | Bluetooth, speakers or headphone output | Bluetooth or cable | Streaming may need internet and an account |
| Offline music player | Storage, screen, audio output | None after files are copied | Old batteries and storage can limit playback time |
| Baby monitor or door camera | Camera, microphone, stable power | Same Wi-Fi network or hotspot | Camera privacy and software-security risk |
| USB-C power sharing | USB-C port and supported power output | USB-C-to-USB-C cable | USB-C does not guarantee power output |
| Mouse or remote input | Usable touchscreen, compatible app | Wi-Fi or Bluetooth, depending on app | Unsupported apps can be unsafe or unusable |
| Household control screen | Readable display, compatible control apps | Wi-Fi, sometimes Bluetooth | Account, internet and app support vary |
| Photo or information display | Screen, charging, display app or local files | None or Wi-Fi | Burn-in, heat and model-specific app limits |
| Task-specific remote | Screen, compatible remote app | Wi-Fi, Bluetooth or infrared if built in | Pairing and account requirements differ |
1. Leave it by the television as a casting device
A spare phone can become a dedicated casting handset. Keeping it near the television means guests or family members do not need to take over a personal phone whenever they want to start supported content.
#1 Best Overall
Setup
- Connect the spare device to the same Wi-Fi network as the television or streaming receiver.
- Install the casting-enabled app that still supports the device’s operating-system version and sign in only if the service requires an account.
- Test discovery and playback, then disable notifications and lock-screen previews so personal messages do not appear on the television.
- Place the handset where it can remain charged without blocking ventilation.
This works only while the relevant apps, network protocols and television remain compatible. If the phone can no longer receive app or security updates, treat it as a limited, low-sensitivity controller rather than a device for banking, email or other private accounts.
2. Turn it into a Bluetooth music player
A phone with working Bluetooth can stay paired to a speaker and serve as a simple music source. It is useful in a kitchen, workshop or shared room because the playback controls remain separate from your everyday handset.
Streaming services generally need an internet connection and may require a current app and account. Downloaded tracks can continue to play when the network is unavailable, but licensing rules differ by service. If wireless performance is unreliable, Sony suggests using a locally stored library through wired headphones when the device has a usable audio output.
Setup
- Charge the old device and remove unnecessary accounts and notifications.
- Pair it with the speaker under the device’s Bluetooth settings.
- Play a short test at the intended distance; thick walls and crowded wireless environments can cause dropouts.
- Use a sleep timer or keep the device on a ventilated surface if it will play for long periods.
3. Use it as an offline music player
Offline playback is the least network-dependent option. Copy music files you own to the device, organize them into folders or playlists, and use the built-in player or a compatible local-audio app. Once the files are stored locally, the phone or tablet can work without Wi-Fi, a SIM card or a streaming account.
Rank #2
- Ideal for Gifting
- Ideal for a bookworm
- Compact for travelling
This role suits a device whose screen and audio output still work but whose software is too old for current streaming apps. Check available storage before copying a large library, and keep a backup of the files elsewhere. A tablet’s larger screen can make browsing albums easier, while its size may make it less convenient to carry.
4. Make a temporary baby monitor or door camera
Sony describes a setup in which camera software runs on the spare phone and monitoring software runs on your current phone. The two devices communicate over the same Wi-Fi network or through a hotspot. The old phone needs a working camera, microphone, stable power and a position with a clear view.
Safer setup
- Install camera and monitoring software only from the device’s official app store, and confirm that both versions support the operating system.
- Create a strong, unique password for any account used by the camera service.
- Connect both devices to the same trusted network or use a hotspot you control; avoid open public Wi-Fi.
- Grant camera, microphone and location permissions only when the app needs them.
- Update the app and device firmware whenever updates are available, and review access logs if the camera service provides them.
- Test alerts, night visibility, audio and reconnection before relying on the setup.
This is a convenience arrangement, not a substitute for a purpose-built safety monitor. A discontinued phone may have unpatched vulnerabilities, and a camera pointed at a home can expose private images or conversations. Disconnect it when the task is finished and do not use it to monitor a sensitive space unless you understand the service’s access controls.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitches5. Share a little power through USB-C
Some phones can provide power to another device through their USB-C port. Sony’s guidance specifies a USB-C-to-USB-C cable, but USB-C alone does not prove that a particular model supports power output. Check the manufacturer’s specifications or manual for power sharing, reverse charging or a similar feature.
How to test it
- Charge the old phone above the level at which it normally protects its battery.
- Connect the two devices with a known-good USB-C-to-USB-C cable.
- Look for an on-screen prompt or battery icon indicating which device is supplying power.
- Stop if either device becomes unusually hot, disconnects repeatedly or shows a warning.
Power sharing is an emergency top-up, not a replacement for a charger. It can drain the old phone quickly, and some tablets or phones accept power but cannot deliver it.
6. Use the touchscreen as a mouse or remote input
A phone with an intact enough screen may work as a mouse for a computer or another device through a compatible remote-mouse app. The exact connection method depends on the app: some use the same Wi-Fi network, while others use Bluetooth or a desktop companion program.
Setup checklist
- Confirm that the app supports both the old device’s operating system and the computer’s operating system.
- Install the desktop component only from the developer’s official source.
- Use the same private network for both devices when Wi-Fi pairing is required.
- Remove accessibility, keyboard or input permissions after you stop using the setup.
Do not install an unsupported package simply because it promises compatibility. An old device with an unpatched operating system should not receive broad control over a work computer, password manager or other sensitive system.
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7. Keep a household control screen available
A compatible phone or tablet can remain on a counter as a control panel for supported lights, thermostats, speakers or other household devices. This is especially convenient when the device is always in one room and does not carry personal messages.
Rank #4
Before committing, verify every dependency: the control app’s minimum operating-system version, whether the account can be used on a second device, and whether the chosen functions work without internet access. The UK Department for Science, Innovation and Technology notes that some smart devices work without being connected to the internet, but others need internet, an app or an account.
Reduce the risk
- Use a separate household account or the narrowest permissions the service allows.
- Disable microphones, cameras, location and Bluetooth when the control task does not need them.
- Set a screen lock and disable message previews.
- Keep the panel on a trusted network and remove it from the account if you retire it.
8. Create a photo or information display
A functioning screen can show a rotating family-photo collection, a calendar, a recipe, a transit timetable or another reference page. This idea is deliberately model-dependent: there is no universal app or setup that works on every old phone or tablet.
Practical considerations
- For offline photos, copy files locally so the display does not depend on a cloud account.
- For live information, confirm that the browser or app still supports the device and that the network is required.
- Lower brightness and use a sleep schedule to reduce heat, battery wear and screen burn-in.
- Keep the display away from direct sun and moisture, and use a stand only after checking the device’s dimensions and charging-port position.
Tablets are often better for this role because their larger screens are easier to read from across a room, but their batteries can be harder to replace and their stands may block side ports.
9. Dedicate it to one remote-control task
A spare device can become a task-specific remote for a supported media player, speaker system, camera, presentation setup or other service. Sony’s remote-mouse example illustrates the broader principle: an old phone can provide focused input without tying up your current phone.
Best Value
- It can be a gift option
- Comes with secure packaging
- Helpful in various ways
Do not assume that a particular remote ecosystem will pair merely because the phone has Wi-Fi or Bluetooth. Check the exact app, operating-system version, account requirement and pairing method before setting it up. If the device includes an infrared emitter, the manufacturer’s specifications must confirm it; most phones and tablets do not.
Keep the remote dependable
- Install only the official companion app and sign in with the least-privileged account available.
- Pair the remote while both devices are on the same network or within Bluetooth range.
- Test power, volume, navigation and reconnection after restarting both devices.
- Label the device and leave it in a fixed location so it does not become a forgotten, unsecured account holder.
Security and privacy rules for any second life
Connected reuse extends the time a device remains part of your digital environment. UK government smart-device guidance recommends enabling automatic updates where available and applying manual updates when prompted. If updates have ended, avoid roles that expose cameras, microphones, location data or important accounts.
- Minimize access: Turn off unused radios, sensors, permissions and accounts.
- Protect networked cameras: Use a unique password, restrict remote access to what you need, update the camera app and firmware, and review access logs when available. The Federal Trade Commission warns that internet-connected cameras can be vulnerable to digital snooping.
- Separate sensitive work: Do not use an unsupported spare device for banking, password storage, primary email or two-factor authentication.
- Watch the battery: Stop using a device that swells, leaks, overheats or smells unusual, especially when left charging unattended.
- Plan retirement: Remove the device from smart-home, camera and media accounts when the project ends.
When to stop reusing it and erase it
If the device cannot hold a charge safely, cannot run the required app, or would need access to private data that it can no longer protect, recycling is safer than repurposing. Before selling or donating, back up wanted photos and files, confirm that you know the service logins, and check that another phone or tablet can still manage any cameras, thermostats or locks linked to the account.
- Back up data and export anything that is not already synchronized.
- Sign out of accounts and remove payment cards, passkeys and authentication tokens.
- Unpair Bluetooth accessories and remove the device from smart-home and media-service device lists.
- Use the manufacturer’s built-in erase or factory-reset function; do not rely on deleting files manually.
- After the reset, verify that the welcome screen appears and remove or recycle the device through an appropriate electronics channel if it is unsafe to power.
A factory reset is also the UK government’s recommended step before giving a smart device to someone else. It protects the next owner from inheriting your accounts and reduces the chance that your data remains accessible.
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