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Oppo F1s
Device specs
- Display
- 5.5" IPS 1280×720
- Battery
- 3,075 mAh
- Chipset
- MediaTek MT6750
- Release year
- 2017
Top guides
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The most popular guides for this device.
System & Settings
Turn Off Developer Options
Once you have finished testing apps or checking performance settings, Developer options often stay active on your Oppo phone without you noticing. That leaves toggles like USB debugging and mock locations exposed, which is a real risk if someone else picks up your device. Switching the menu off brings the settings list back to its standard, secure state.
OpenDisplay & Home ScreenDouble Tap to Wake Screen
Reaching for the power button just to check the time or read a notification gets tiring fast. On Oppo phones running ColorOS, a quick double tap on the lock screen can wake the display instead, but this option is not always active out of the box. It sits inside a display menu that most people never open, so the phone keeps needing a button press.
OpenNetwork & ConnectivityTurn Wi-Fi Calling On or Off
If calls keep dropping or the other side sounds broken up whenever you are in a basement, elevator or rural spot, the real problem is usually weak cellular coverage, not a broken phone. Wi-Fi Calling lets your Oppo route voice calls through a connected WiFi network instead of the mobile signal. This only works if your carrier actively supports the feature for your plan.
OpenSystem & SettingsTurn On/Off USB Debugging
If your Oppo phone stays invisible to a computer running ADB, flashing tools or app debugging software, USB debugging is almost certainly switched off. This option only shows up once Developer options have been unlocked, which is why many people search Settings without ever finding it.
OpenPhoto, Video & MediaAllow or Deny Picture-in-Picture Per App
If a video collapses into a floating window when you switch away from an app on your Oppo phone, or if that floating window refuses to appear at all, the picture-in-picture permission for that specific app is the cause. This setting is controlled per app, so one app can support it while another stays blocked. Streaming apps, video calls and some browsers behave differently depending on how this permission is set.
OpenSystem & SettingsChange the Region in Settings
If apps keep showing you content, prices, or app suggestions for the wrong country, the region set on your Oppo phone is likely the cause. ColorOS uses this region value to decide which local content, weather data, and regional services apps display. Changing it in the settings does not lift a Google Play Store restriction or unblock region-locked streaming content.
OpenCalls & MessagesTurn On/Off Call Forwarding
If calls keep landing in your voicemail or a colleague never gets your missed calls, call forwarding on your Oppo phone might be set to the wrong option. ColorOS separates forwarding into If busy, If unanswered, If not available and Always forward, and each one reacts differently depending on your line status. Picking the wrong mode is the usual reason calls disappear instead of reaching a backup number.
OpenSecurity & PrivacyLock or Unlock Home Screen Layout
If your Oppo home screen suddenly won't let you move icons, delete widgets, or drop folders into a new spot, a system function called Home screen locked is active. This setting freezes the entire layout so nothing on the home screen can be added, removed, or repositioned by accident. It often gets switched on without you noticing, especially after restoring settings or handing the phone to someone else.
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