How Much Mobile Data Do I Need?

Choosing the right phone plan starts with a simple question: how much mobile data do I need? The amount you need depends on how often you watch videos, scroll social media, share your internet, and connect to home Wi-Fi. 

If you only send basic messages and check maps, 1GB to 5GB each month is usually plenty. If you use social media and stream music every day, you will likely need between 5GB and 20GB. Heavy users who watch lots of videos on public transport or share their data with a laptop usually need 20GB to 100GB, or even an unlimited data plan. 

This guide explains how mobile data works, how much data common apps use, and how to find the best plan for your routine. 

What Is Mobile Data and How Does It Work? 

Mobile data connects your mobile phone to the internet when you are away from home broadband. 

When you use Wi-Fi, your phone talks to a broadband box plugged into a wall. When you step out of your home, your phone connects to mobile masts using 4G or 5G radio signals instead. 

Mobile phone internet is measured in megabytes (MB) and gigabytes (GB). There are 1,024 megabytes in one gigabyte. 

Small tasks like reading a text email use only a few kilobytes or megabytes. Larger tasks like watching clear videos or downloading big mobile games quickly take up gigabytes. 

Every time you open an app or read news without Wi-Fi, your phone takes data from your monthly mobile allowance. 

How Much Data Does the Average Person Use Per Month? 

Many people trying to cut their phone bill ask: how much data does the average person use per month in the UK? 

According to Ofcom’s February 2026 Pricing and Consumer Engagement Report, the average monthly usage for pay-monthly SIM-only customers in the UK reached 13GB in Q2 2025. 

Average data use continues to rise across the UK because mobile phone apps now feature more high-quality video clips than ever before. 

However, this average number is only a general guide and not a rule for everyone. 

If you work from home and use Wi-Fi all day, buying 13GB means paying for data you never touch. If you travel on the train for hours without Wi-Fi, you might finish 13GB in just two weeks. 

How Much Data Do Different Online Activities Use? 

The apps on your smartphone burn through mobile data at very different speeds. Text messages use very little data, but online video burns through your allowance fast. 

Here is roughly how much data everyday phone tasks use: 

Note: Data consumptions may vary based on device, screen size, and output quality including video, sound, and picture size and quality.

Video quality settings change these numbers. Watching a video in clear high definition uses three times more data than standard definition. 

For closer looks at specific apps, read our helpful guides on how much data YouTube uses, Netflix data usage, how much data Spotify uses, and mobile hotspot data usage. 

How Much Mobile Data Do You Need Per Month? 

To pick the best mobile plan, you must decide what type of phone user you are. 

Most mobile phone owners fit into one of four basic user groups: 

• Light User (1GB to 5GB): Best for sending text messages, online banking, and checking maps. 
• Moderate User (5GB to 20GB): Best for daily social media scrolling and streaming music. 
• Heavy User (20GB to 100GB): Best for watching daily online videos and using a phone hotspot. 
• Very Heavy User (100GB or Unlimited): Best for daily 4K video streaming and users without home broadband. 

Light Users - 1GB to 5GB 

This small plan is best if you spend almost all your time at home or office Wi-Fi. You only use mobile data to send quick texts, check bus times, or open your banking app. 

Picking a 1GB to 5GB plan keeps your monthly bill very low. 

Moderate Users - 5GB to 20GB 

This range fits the majority of ordinary smartphone users. It gives you enough data to listen to music, scroll on social media, and read the news every day. 

If you want to know if 10GB works for you, check out our guide on whether 10GB is enough for a month. 

Heavy Users - 20GB to 100GB 

This tier is best if you watch videos on the bus, download podcasts on the go, or make long video calls. It gives you freedom, so you do not have to stress about running out of the internet. 

To see if this size suits your routine, read our guides on how long 50GB lasts and whether is 100GB enough. 

Very Heavy Users - 100GB or Unlimited 

This top tier is made for people who use their phone as their main home internet. It fits workers who connect laptops to their phone all day and people who watch high-definition shows constantly. 

If you are thinking about an uncapped plan, check our guide on whether an unlimited data SIM is truly worth the extra cost. 

How to Calculate Your Monthly Mobile Data Usage 

You can easily find your monthly data needs by doing a quick everyday calculation. 

First, count how many hours each day you use your phone away from Wi-Fi. 

Second, look at the tasks you do during that time and add up the megabytes. 

Third, multiply that daily total by thirty days to see your monthly number. 

Finally, add a few extra gigabytes to your total as a safety cushion for emergencies. 

Here is an example for someone who commutes every day: 

• 45 minutes of Spotify music = about 80MB 
• 30 minutes of social media = about 250MB 
• 30 minutes of standard YouTube video = about 250MB 
• Background emails and app alerts = about 50MB 

This adds up to around 630MB per day. Over thirty days, that equals roughly 19GB of monthly data. 

Adding a small safety buffer brings the ideal allowance to about 25GB each month. 

You can also use an online mobile data usage calculator to test your daily habits automatically. 

How to Check Your Mobile Data Usage 

Checking your actual usage history takes the guesswork out of picking a plan. 

How to Check Mobile Data Usage on iPhone 

Open your iPhone Settings app and tap Mobile Data (or Cellular). 

Scroll down to see the total data used during the current tracking period. 

To make sure these numbers match your monthly bill, scroll to the bottom and tap Reset Statistics on the day your plan renews each month. 

How to Check Mobile Data Usage on Android 

Open the Settings app on your Android phone and select Network & Internet. 

Tap SIMs and choose App Data Usage to see a clear list of what apps use your internet. 

You can set the tracking dates in the settings menu so the cycle matches your monthly bill date. 

How to Check Your Talk Home Mobile Data Balance 

Your phone settings show general hardware numbers, but your network operator shows your exact billing balance. 

Talk Home Mobile users can check their live balance in three quick ways: 

• Open the My THM mobile app on your phone to see your remaining data balance on the main screen. 
• Log into your account on the official Talk Home Mobile website to check your plan. 
• Dial *123# on your phone keypad to get your balance on the screen instantly. 

How to Reduce Your Mobile Data Usage 

If you find yourself running out of data before the month ends, small daily changes can save lots of gigabytes: 

• Always connect your phone to trusted Wi-Fi at home, school, or work. 
• Lower your video playback quality in app settings to standard definition. 
• Download your music playlists and podcast episodes over home Wi-Fi before you travel. 
• Turn off background app refresh for shopping and social media apps in your phone settings. 
• Set app stores to update your mobile apps only when connected to Wi-Fi. 
• Turn on low data mode when sharing your mobile hotspot with a laptop. 

What Happens If You Run Out of Mobile Data? 

What happens when your data allowance hits zero depends on your mobile provider's terms. 

Some networks let you keep browsing, but charge very high penalty fees for every extra megabyte. 

Other mobile networks slow your connection down until basic websites take minutes to load. 

With Talk Home Mobile, your data simply pauses when your allowance finishes. This protects you from surprise charges and high out-of-bundle costs on your bill. 

Your regular phone calls and normal SMS text messages continue to work without any problems. 

How to Buy More Data 

If you finish your monthly data early, you do not have to wait until next month to use the internet. You can easily go to how to buy more data and purchase a data add-on. 

A data bolt-on is an extra packet of data you add to your active SIM card to keep you connected. 

Talk Home Mobile makes getting extra data very easy: 

• Open the My THM app and choose the extra data bundle you want. 
• Use the online Fast Buy tool on the Talk Home Mobile website to add data using just your phone number. 
• Call customer support on 579 from your handset to add credit. 

If you run out of data every month, moving to a larger monthly plan usually saves more money than buying single add-ons. 

How to Choose the Right SIM-Only Data Plan 

When looking for a mobile deal, compare plans using a few simple points: 

• Check how many gigabytes you actually use each month. 
• Pick a monthly price that fits your budget without surprise fee increases. 
• Think about how often you have access to home broadband. 
• Make sure your provider allows you to share your data through a mobile hotspot. 
• Decide if you prefer a 30-day rolling deal or a 12-month contract. 
• Check if the plan includes roaming benefits for holidays abroad. 

If you are comparing different contract types, read our helpful guide on what is a SIM-only deal to see how they work. 

Flexible SIM Plans with Talk Home Mobile 

If you want dependable service without being tied down by long contracts, Talk Home Mobile offers simple SIM-only data plans. 

Talk Home Mobile offers great everyday benefits for UK mobile users: 

• Runs on the nationwide EE network, giving you strong coverage across 99% of the UK population. 
• Delivers fast 4G and 5G internet speeds for smooth streaming and quick browsing. 
• Offers flexible 30-day rolling plans that you can change or cancel whenever you like. 
• Requires no credit checks on upfront plans, making it easy for anyone to join. 
• Includes EU roaming on eligible plans so you can use your phone when travelling. 
• Comes with fixed prices on eligible plans with no surprise mid-contract price rises. 

Whether you need a small 5GB plan or a generous 50GB bundle, you can pick a deal that matches your daily life. 

Conclusion 

Finding out how much mobile data you need comes down to looking at your daily habits. 

Instead of paying extra money for an expensive unlimited plan, check your recent usage history, count your Wi-Fi hours, and pick a plan that gives you just enough room to browse comfortably. 

Find a SIM-Only Plan That Matches Your Data Needs 

Whether you need a few gigabytes for everyday browsing or a larger allowance for streaming, explore Talk Home Mobile's flexible SIM-only data plans and choose a plan that suits your usage and budget. 

Frequently Asked Questions 

How much mobile data do I need per month? 

Most people in the UK need between 10GB and 25GB of data each month. If you use Wi-Fi all day, 5GB is usually enough. If you watch videos on the go every day, aim for 30GB to 50GB. 

How much data does the average person use per month in the UK? 

According to Ofcom's February 2026 report, the average monthly usage for UK pay-monthly SIM-only customers was 13GB in Q2 2025. People use more data now because video apps are so popular. 

Is 10GB of data enough for a month? 

Yes, 10GB is plenty for moderate smartphone users who have Wi-Fi at home. It gives you about 100 hours of browsing the web, 80 hours of music, or 10 hours of video streaming. 

Is 50GB of data enough for a month? 

Yes, 50GB is a large allowance that easily covers heavy internet use. It lets you watch around 50 hours of standard video and use your phone hotspot freely. 

How long does 100GB of data last? 

For an ordinary user, 100GB can last several months. In a single month, it allows over 100 hours of video streaming, 800 hours of music, or daily laptop hotspotting. 

Does using Wi-Fi count towards mobile data? 

No. When you are connected to Wi-Fi, your phone uses your home broadband instead of your SIM card. Your mobile data allowance stays untouched. 

How can I buy more mobile data? 

You can buy more mobile data by getting a data bolt-on from your network provider. Talk Home Mobile users can add data via the My THM app or online using Fast Buy. 

Is unlimited mobile data worth it? 

An unlimited data plan is only worth the higher price if you do not have home broadband or share your mobile hotspot every day. If you have Wi-Fi at home, a standard 15GB to 50GB plan gives you much better value.