When your iPhone 16's internet crawls, it can feel like you're stuck in the past. Videos buffer endlessly, web pages hang, and apps refuse to load. I'd start by checking your cellular data mode, as that's often the quickest fix for slow speeds on iOS 26.
Go to Settings > Cellular > Cellular Data Options > Voice & Data. Make sure it's set to "5G Auto" or "5G On" for the fastest available connection. If it's on "LTE," your phone won't use the faster 5G network even when it's available.
Reset Your iPhone 16's Network Settings
If your connection is consistently poor, a network settings reset can clear out any corrupted configurations. This will erase all saved WiFi passwords, so make sure you have them handy.
Head to Settings > General > Transfer or Reset iPhone > Reset. Tap "Reset Network Settings" and enter your passcode to confirm. Your iPhone 16 will restart, and you'll need to reconnect to WiFi networks and re-pair Bluetooth devices.
Manage Background App Refresh
Apps updating in the background can consume bandwidth and slow down your active tasks. You can control this globally or for specific apps.
Open Settings > General > Background App Refresh. You can toggle it off completely or scroll through the list to disable it for apps that don't need constant updates, like games or streaming services you only use manually.
Check and Toggle WiFi Assist
WiFi Assist is a handy feature that switches you to cellular data when your WiFi connection is weak. Sometimes, if it's too aggressive, it might switch you to a slow cellular spot. Other times, having it off means you're stuck on a bad WiFi signal.
To check it, go to Settings > Cellular and scroll all the way to the bottom. Toggle WiFi Assist off, test your speed, then turn it back on and test again. See which setting gives you better performance in your current location.
Clear Safari History and Website Data
Over time, Safari's cache and website data can become bloated and cause slowdowns. Clearing it out is a good periodic maintenance step.
Navigate to Settings > Safari. Scroll down and tap "Clear History and Website Data." Confirm your choice. This will log you out of websites, so you'll need to sign in again, but it often helps pages load faster.
Disable VPN and Content Blockers Temporarily
VPNs reroute your traffic through another server, which almost always adds some latency. Similarly, aggressive content or ad blockers can interfere with how web pages load.
If you're using a VPN, open the VPN app and disconnect it, then test your speed. For Safari content blockers, go to Settings > Safari > Extensions and toggle them off one by one to see if any are causing the slowdown.
Update iOS to the Latest Version
Apple frequently releases updates that include connectivity improvements and bug fixes. An outdated version of iOS 26 could be the source of your network problems.
Go to Settings > General > Software Update. If an update is available, tap "Download and Install." It's best to do this while connected to WiFi and a power source.
Perform a Force Restart
A simple force restart can clear temporary software glitches affecting the modem or network stack. It's different from a normal restart and doesn't delete any data.
Quickly press and release the Volume Up button. Quickly press and release the Volume Down button. Then, press and hold the Side button. Keep holding it until you see the Apple logo appear, then release. This takes about 15 seconds.
Review Your Cellular Data Plan and Coverage
Sometimes the issue isn't your phone, but your plan or location. Your carrier might be throttling your data speeds if you've exceeded a monthly cap.
Check the coverage map for your carrier in your area. Also, try moving to a different location, as building materials or network congestion can drastically affect signal strength. If you're in a dense area, switching from 5G to LTE can sometimes provide a more stable, if not peak-speed, connection.
