Person with glasses holding a mobile phone in front of a laptop

Should I leave mobile data on all the time?

Mobile data is super handy for when you can’t connect to Wi-Fi, but is it a good idea to leave it on all the time? In this guide, we explain all. 

What is mobile data?

Mobile data is a smartphone feature that allows the user to access the internet while not on Wi-Fi. 

Your phone will usually use 3G, 4G, or 5G technology to connect to the internet. 5G is the newest data available, but is not available on all phones. 3G and 4G are more common and are accessible on most smartphones. 

What uses up mobile data?

Anything that needs the internet to function will use up mobile data if you’re not connected to Wi-Fi. 

  • Browsing on search engines like Google
  • Refreshing, sending, and receiving emails 
  • Sending and receiving iMessages on iPhones (you don’t need mobile data to send text messages)
  • Video chat apps such as Skype, FaceTime, Zoom, etc.
  • Social media messaging apps like Facebook, Twitter, WhatsApp
  • Streaming television episodes, videos, or movies on streaming apps like Netflix and YouTube
  • Streaming songs on music apps like Spotify or Apple Music
  • Playing games on your phone

All these activities use up different amounts of mobile data depending on how demanding they are. For example, watching a YouTube video in HD will consume more data than watching it in a lower quality. Learn more about how much data different activities use up

For a better idea of how much data these activities eat up, you can check out our data guides and find the right amount for you

Should you leave mobile data on all the time?

You may want to keep your mobile data on all the time so you never miss a notification, but it’s best if you don’t do this. Here’s why. 

Excessive data usage

While having your mobile data on for a couple of hours a day is fine, having your mobile data on constantly could have a negative effect on your phone. 

Mobile data is used in the background by some apps. If you keep it turned on, it will still be consuming your allowance even if you’re not actively doing anything on your phone. 

Things get worse if you allow your apps to update using data. You could accidentally use GBs of extra data, compared to if you just waited till next on Wi-Fi. 

It’s a good idea to monitor your mobile data usage so you can keep an eye on how much you tend to use up per month, so you know when it’s best to have your data turned on or off. This will also allow you to gain a better understanding of the most cost-effective bundle for you. 

It drains your battery

Keeping your mobile data on will drain your battery quicker than if it was off. There’s a few reasons why this happens. 

Firstly, your phone will be constantly searching for signal. If you’re in an area with particularly poor signal, things only get worse, as your phone consumes more power whilst searching. 

Secondly, your apps that use data in the background will drain your battery. When an app sends you a push notification, it needs a bit of battery to do this. Same for if they update in the background - it’s all extra demand on your phone and, therefore, more battery consumption. 

Of course there is plenty more you can do to make your battery last longer, but for starters, turning off your mobile data will help. 

Privacy concerns

If you’re wanting to stay off the grid, you should turn your data off. By having it switched on, your mobile service provider could (theoretically) track your phone’s location. 

You may have previously given apps permission to use your location data too, meaning that you're unwittingly sharing your private information.  

Of course, if none of these are a worry to you, there’s no harm in leaving your data on all the time! 


Follow us on Facebook and Twitter to be the first to know when we publish a new guide or tip!

No contracts, no limits
No contracts, no limits

With no contract you have the freedom to flex your usage whenever you need to.

Powered by Vodafone
Powered by Vodafone

Powered by Vodafone with up to 99% UK population coverage.

Cap your spend
Cap your spend

Put a limit on how much you spend every month so you don't need to worry about getting a big bill.

Switched to Asda Mobile after Virgin Mobile decided to scrap all Pay as You Go sims from January, 22. Surprisingly, the switch was smooth, brilliant customer service and coverage better than Virgin mobile.


First month been with Asda mob bought the max bundle for 30£ worth every penny The Signal has been 👌 not one issue or been slow it's been Super reliable with top notch speeds! Impressed 👏


My experience has been far from negative and I’m very happy & impressed with how simple and good Asda Mobiles app, website & Call Centre is. Made one call to them and everything sorted, worked first time.


I found the service excellent. I topped up straight away using my debit card on the website and my old number was ported as promised within 24 hours. The signal seems fine to where I live. Thanks!