You can always go to the Wi-Fi settings menu where you connect to wireless networks and see if you are connected. You should see below the SSID the word "Connected" if that's the case. If you are connected with WiFi, your mobile connection is automatically disabled.
Even if you are away from home and not connected to a WiFi network, you may well want to leave WiFi on as it improves location accuracy. If you have WiFi on and it's connected, it will be used by default, unless the phone is locked, in which case it will switch back to cellular.
To turn off your cellular data go to Settings > Mobile Data (or Cellular Data) and toggle the Mobile/Cellular Data switch to off. This will turn off all cellular data and restrict all data to Wi-Fi, including email, web browsing and push notifications.
WiFi for Android is a priority. If there is WiFi and Android Data, the WiFi will take over the data connection. However in order to use only Mobile Data, you need to turn off the WiFi manually.
Generally, when your phone is connected to your home or any other Wi-Fi network, it will not connect to the 5G, 4G, 3G, or any type of wireless carrier network. Any data used via Wi-Fi will not count toward your data plan. Most phones have an option under “Settings” to turn “Cellular data” completely off.
Check Data Syncing IntervalsIf your calendar, contacts, and email sync every 15 minutes, it can really drain your data. Have a look under “Settings” > “Accounts” and set your email, calendar, and contact apps to sync data every few hours or set them to only sync when connected to Wi-Fi.
Turn on Data SaverThat's why you should turn on Android's Data Saver feature immediately. With Data Saver enabled, your Android handset will restrict the background use of cellular data, thereby saving you from any unpleasant surprises on your monthly mobile bill.
When cellular data is off, apps will only use Wi-Fi for data. To see the cellular data usage for individual System Services, go to Settings > Cellular or Settings > Mobile Data. Then scroll to the bottom of the screen and tap System Services. Cellular data can't be turned on or off for individual System Services.
Since Android phones come from a variety of manufacturers, the name and settings could vary. If Switch to Mobile Data is enabled, your phone will automatically use it whenever the Wifi signal is weak, or it's connected, but there's no internet.
Answer: A: Set all of your wifi AP's to the same SSID name and the iPhone will roam automatically to the strongest signal and seamlessly too.
Go to Settings > Cellular or Settings > Mobile Data. Then scroll down and tap the slider for Wi-Fi Assist.
If, you're connected to wifi, that's what your phone will use. If not, it'll drop back to your cellular data.
If you're on iOS, first turn off Wi-Fi assist. This feature automatically switches your phone to a cellular data connection when your Wi-Fi connection is poor. Your apps might also be updating over cellular data, which can burn through your allotment pretty quickly.
Restrict background data usage by app (Android 7.0 & lower)
- Open your phone's Settings app.
- Tap Network & internet. Data usage.
- Tap Mobile data usage.
- To find the app, scroll down.
- To see more details and options, tap the app's name. "Total" is this app's data usage for the cycle.
- Change background mobile data usage.
(On iPhone, tap the “Settings” icon, tap “Cellular,” then turn off “Cellular Data.” On Android, tap the “Settings” icon, tap “Network & internet,” tap “Mobile network” and turn off “Mobile data.”) After turning off mobile data, you'll still be able to make and receive phone calls and get text messages.
Turning wifi /mobile data on/off isn't harmful. You can do that if you can live with missing messages or mails.
