Enable or Disable SIM Card Lock
Enter the wrong SIM PIN three times and OnePlus locks the card, asking for the PUK code from your carrier instead of the PIN. Some people also want to turn this protection off entirely so a restart never asks for a PIN again. Both changes sit in the same security setting, and mixing them up can lock the SIM completely.
Enable or Disable Bluetooth Tethering
Sharing your OnePlus phone's mobile data over USB or a Wi-Fi hotspot drains the battery fast or needs a cable you do not always have on hand. Bluetooth tethering lets a laptop, tablet, or second phone use your connection with far less power draw, but the toggle sits buried inside the hotspot settings and is often switched off by default.
Switch Automatically Between Wi-Fi and Mobile Data
If your OnePlus stays connected to a weak or dropping Wi-Fi network instead of falling back to mobile data, video calls stutter and pages fail to load even though your data plan is active. This happens because the Intelligent network connection feature, which lets your phone hop onto mobile data during unstable Wi-Fi, is turned off by default. Once you know where to find it, fixing the constant buffering takes less than a minute.
Set Preferred Network Type (2G/3G/4G)
If your OnePlus keeps losing signal or drains battery fast in a weak 4G area, the modem is likely stuck hunting between network generations. By default the preferred network type is set to search automatically across 2G, 3G and 4G for the best possible connection. In patchy coverage zones that automatic switching can cause dropped calls, slow data or extra battery drain, and locking the phone to a lower or single network mode often gives a more stable result.
Enable or Disable Wi-Fi Calling
When your carrier signal drops to one bar indoors, calls often cut out or fail to connect entirely. Wi-Fi calling routes voice calls through your wireless network instead, but it only works if your provider has switched on the feature for your SIM. If the toggle is missing or stays greyed out, that mismatch is usually the reason.
Show Old SMS Messages Stored on SIM Card
After switching to a OnePlus phone, older SMS messages from a previous SIM card do not show up automatically in the Messages app. They are still stored in the SIM card memory, not on the phone itself, so the app needs to be pointed to that storage location first. This mostly affects people who used SMS storage on the SIM before switching devices.
Change Mobile Hotspot Band
If a laptop or older tablet cannot see your OnePlus hotspot at all, or a newer device only gets a weak signal through walls, the wrong Wi-Fi band is usually the cause. The personal hotspot on OnePlus phones can broadcast on either the 2.4 GHz or the 5.0 GHz band, and each has different trade-offs for range and speed. Picking the wrong one for your situation leads to dropped connections or frustratingly slow transfers.
Reset Network Settings (Wi-Fi, Bluetooth, Mobile Data)
Wi-Fi keeps dropping, Bluetooth won't pair, or mobile data refuses to connect even though the signal looks fine? On OnePlus phones this often points to a corrupted connection profile rather than a hardware fault. A full network reset clears these profiles so you can rebuild every connection from scratch.
Assign a Default SIM Card to a Contact
If your OnePlus phone keeps asking which SIM to use before calling a certain contact, that contact has no fixed calling SIM set. On dual SIM setups this means every outgoing call to them needs a manual choice, even if you always use the same line for that person.
Change USB Connection Type
When you plug your OnePlus phone into a PC or laptop, it defaults to charging only and blocks file access. If Windows or macOS does not show the phone as a drive, or you need MIDI or PTP mode instead of MTP, the connection mode is set wrong on the phone side.
Open WiFi Network Notification
If your OnePlus keeps popping up alerts every time you walk past a coffee shop or airport hotspot, the open network notification is doing its job a little too well. This constant pinging gets old fast in busy public areas. You can control exactly when and if these alerts show up.
Enable or Disable USB OTG
When a USB flash drive, mouse, or keyboard connected to your OnePlus phone via USB-C is not detected, USB OTG support is usually switched off in the system settings. Without this option enabled, the phone will not exchange data with external USB accessories even if the hardware itself supports OTG. Leaving OTG active also has a small effect on battery drain when accessories stay plugged in for long periods.
Print a PDF File via Wi-Fi
When a printer sits in the same room but a PDF still will not print from your OnePlus phone, the Wi-Fi printing feature usually is not activated correctly. Android needs to detect the printer on the same network before the print dialog shows any device to choose from. Without that connection, the option list stays empty even though everything looks fine at first glance.
Enable or Disable Data Roaming
Landing abroad with data roaming still switched off leaves your OnePlus without maps, messages or mobile data until you find a WiFi network. Roaming lets your phone connect through a partner network in another country, but this toggle usually ships turned off to avoid surprise charges. Leaving it on for the whole trip without checking your provider's roaming plan can also lead to a higher-than-expected bill.
Enable or Disable Location (GPS)
If regional weather widgets show the wrong city or navigation apps cannot find your position, Location access on your OnePlus phone might be turned off. Location runs by default to support GPS-based features, but constant background tracking also drains the battery faster than expected. You can check the current status and switch it directly from the quick settings panel or the main settings menu.
Set a Mobile Data Limit
If mobile data keeps running past what you planned to use, your OnePlus phone can cut it off automatically. This relies on a feature called Automatic Disconnection of Network Connections combined with a data limit you define yourself. Once usage hits that value, mobile data switches off and stays off until the next billing cycle starts.
Set Up a VPN Connection
If your OnePlus phone connects to public Wi-Fi or you need to reach a company network from outside the office, an unprotected connection leaves your traffic open to snooping. A VPN profile encrypts that traffic and can route it through a server in another region, but only works once the correct server details are entered on the device. Without those details, the connection fails or falls back to your regular network.
Enable or Disable a SIM Card
On a Dual SIM OnePlus phone, one line sometimes needs to be shut off completely instead of just switched to the background. Turning off a SIM card stops it from receiving calls and texts right away, while mobile data and messaging priorities move automatically to the remaining card. This is useful when a second line sits unused for a while but should not be removed from the tray.
Enable or Disable USB Tethering
If your laptop or PC shows no internet connection after plugging in the USB cable, USB tethering on your OnePlus is probably still switched off or fighting with another active connection. Some OxygenOS versions also pop up a prompt asking which network connection to share, and picking the wrong one leaves the computer offline. This is different from a broken cable or driver issue, since the phone controls the tethering toggle itself.
Turn Off Wi-Fi Hotspot Automatically
If your OnePlus hotspot stays on for hours after everyone has disconnected, it keeps draining battery for no reason. This happens when the automatic shutoff for the Wi-Fi hotspot has been switched off or was never turned on. The setting only kicks in once no device has been connected for a few minutes.
Enable or Disable Location Data in Photos and Videos
If your photos and videos do not show where they were taken in the gallery app, the camera is not tagging them with location data. This can happen after a system update or a fresh camera app install, when location tagging quietly resets to off. Turning geotagging back on lets you see the exact spot of every shot later, which is useful for travel photos or documenting a job site.
Rename SIM Card
When both SIM slots run cards from the same mobile carrier, the phone shows an identical label for each and calls or data usage become hard to tell apart. OxygenOS displays this carrier name by default instead of a custom label. Renaming each SIM card fixes the mix-up without needing to swap slots or restart the phone.
Delete Access Point Name (APN)
A wrong or outdated APN entry on your OnePlus phone can block mobile data or MMS even though your SIM card works fine elsewhere. This often happens after switching providers, since the old carrier's APN stays saved and OxygenOS keeps using it by default. Removing the leftover entry clears the conflict without touching your other network settings.
Setting Up a Wi-Fi Hotspot with Custom Name and Password
If your OnePlus hotspot still shows the default device name or has no password at all, anyone nearby could spot it or try to connect. This happens because the personal hotspot feature activates with a generic name and no security until you set your own credentials. It does not matter whether you prefer letters, numbers, or a mix - the important part is setting it yourself.