How to find your own mobile number (iPhone and Android)

It happens to almost everyone: someone asks for your mobile number, you go blank, and you realise you have no idea what your own number actually is. It is far more common than people admit — we rarely dial our own number, so there is little reason to memorise it, especially on a relatively new SIM. The good news is that finding your own mobile number takes seconds, and there are several easy ways to do it on both iPhone and Android, plus a universal short code you can dial on any UK network. This guide walks through each method clearly, so whether your phone is to hand or you are setting up a new SIM or eSIM, you will be able to find (and note down) your number in moments.

#Find your number on an iPhone

On an iPhone, the quickest route is through Settings. Open Settings, tap Phone, and your number is shown at the top under 'My Number'. That's it — no dialling required. If you have a Dual SIM iPhone (a physical SIM plus an eSIM, or two eSIMs), each line is listed separately, so you'll see a number for each; make sure you're reading the one you mean. An alternative is the Phone app: open it, go to Contacts, and your own contact card usually sits at the very top (often labelled with 'My Card' or your name), showing your number. You can also find it in the Contacts app itself the same way. If your own card doesn't show a number, the Settings > Phone route is the reliable one.

If you've just inserted a new SIM or activated a new eSIM on your iPhone and the number isn't showing yet, give it a moment to register on the network, then check again — occasionally it takes a short while to populate, or a quick restart helps. It's also worth knowing that the number shown is the one the SIM is provisioned with, which is exactly what other people see when you call them. Once you've found it, consider adding it to your own contact card (Contacts > your card > Edit) so it's always there. If you're curious how your number relates to networks and prefixes, our UK mobile networks by prefix guide explains what the 07 ranges mean.

#Find your number on an Android phone

Android phones vary a little by manufacturer (Samsung, Google Pixel, and others all word their menus slightly differently), but the route is broadly the same. Open Settings, then look for About phone (sometimes 'About device'). Inside, tap Status (or 'SIM status', or 'SIM card status'), and you'll find 'My phone number' listed there. On some phones it's under Settings > Connections or Network & internet > SIM cards, where tapping the SIM shows its number. If your phone has Dual SIM, each SIM is listed separately with its own number, so check the one you intend to share.

If the number shows as 'Unknown' or blank — which can happen on some SIMs or networks where the number isn't stored on the SIM itself — don't worry; that's a known quirk and doesn't mean anything is wrong with your line. In that case, use one of the universal methods below (dialling your network's short code, or simply calling a friend) to find it. As on iPhone, once you've found your number it's worth saving it in your own contact entry or a notes app so you don't have to hunt for it again. And if you've just set up a new SIM or eSIM, give it a moment to register before checking, or restart the phone if it doesn't appear straight away. Our eSIM guide covers setting up and managing eSIMs if that's how your number is delivered.

#The universal method: dial a short code or text your network

If the settings menus aren't cooperating — or you just want the fastest universal trick — most UK networks let you find your own number by dialling a short code or sending a quick text, regardless of your phone type. The exact code differs by network, but the idea is the same: you dial a short sequence (or text a keyword to a short number) and your network replies, often by text, with your mobile number. Because the code varies between providers and can change, the reliable approach is to check your network's help pages or app for the current 'find my number' code, or simply use one of the no-code methods below. This network method is especially handy on a phone where the number shows as 'Unknown' in settings, since it asks the network directly rather than reading it from the SIM.

#The simplest trick of all: call or text someone

When all else fails — or you just want the quickest possible answer — simply call or text someone you know, and your number will appear on their screen. Ring a friend or family member and ask them to read out the number that came up, or send them a quick text and let them tell you the sender's number. It's low-tech, but it's foolproof and works on any phone, any network, with any kind of SIM, because it shows the actual number you're presenting to the world. If you don't want to bother anyone, you can also call a service that reads your number back, or send a text to your own landline or another device you own and read it there. The 'call a friend' method is particularly useful when your phone's settings show 'Unknown' or you're not sure which of two Dual SIM lines is which — whichever line you place the call on is the number that shows up.

This method also has a nice side benefit: it confirms not just what your number *is*, but that your line is working and presenting your number correctly (rather than showing as withheld or 'No Caller ID'). If your number shows as withheld when you call a friend, that's a sign you have caller-ID withholding switched on, which you can turn off in your phone's call settings if you'd rather your number was visible. For the related question of how other people's numbers show up — and how to identify an unknown caller — see our who called me guide.

#Finding your number via your network account or app

Another dependable place to find your own number is your mobile network's app or online account. Every UK provider has an app (and a website account) where you log in to manage your plan, and your mobile number is almost always displayed prominently there — often right at the top of the home screen or under your account details. This is handy because it doesn't depend on your phone's settings or the SIM, and it works even if your handset is showing 'Unknown'. It's also the place to find related details like your plan, allowances and billing. If you don't have the app installed, it's worth doing so anyway, as it's the easiest way to keep track of your number, your usage and your account in one place — our how to check your data balance guide covers using the network app to monitor data, which sits right alongside finding your number.

If you've never logged in before, you'll typically register with your number and a verification code sent by text, after which your number and account details are all there. Keep your login handy, because the network app is also the quickest route for re-issuing an eSIM, checking roaming inclusions, and a host of other tasks. In short, between your phone's settings, a short code or text, calling a friend, and your network app, there are at least four independent ways to find your own number — so you're never truly stuck, whichever phone or network you're on.

#Dual SIM, eSIM and second numbers

A quick but important note for anyone with more than one line: if your phone has Dual SIM (a physical SIM plus an eSIM, or two eSIMs), you have two separate mobile numbers, each with its own — so 'what's my number?' has more than one answer, and you need to be clear which line you mean. In your phone's settings, the two lines are listed separately (often with labels you can rename, like 'Personal' and 'Work'), each showing its own number. When you call or text someone, the number that appears is whichever line you used for that call or message, so the 'call a friend' method is a reliable way to confirm which number belongs to which line. If you've recently added a travel eSIM or a second plan, its number will be different from your main one, which is worth bearing in mind so you share the right number with the right people.

It's also worth knowing that your number stays the same whether it's delivered on a physical SIM or an eSIM — the eSIM is just how the SIM is provided, not a different kind of number, as our eSIM guide explains. So if you switch your existing number from a plastic SIM to an eSIM, or move it to a new phone, your number doesn't change and you find it using exactly the same methods. The only thing to watch is that, after setting up a new SIM or eSIM, the number may take a moment to show in settings, so use the network app or the 'call a friend' trick if you need it immediately.

#Why we forget our own numbers

If you feel faintly silly for not knowing your own number, don't — there's a simple reason almost nobody has it memorised, and it isn't a sign of a poor memory. We memorise the numbers we dial repeatedly, and the one number you never dial is your own. In the past, people often knew their home landline by heart because they recited it to friends, wrote it on forms, and heard it read back constantly; mobile numbers, by contrast, are shared digitally — you tap a contact, share a card, or send a link — so the digits rarely pass through the part of your memory that would learn them. Add in the fact that many people change numbers when switching networks or get a new SIM, and there's simply little chance for the number to stick. So the modern reality is that 'what's my number?' is a lookup task, not a memory task, which is exactly why knowing where to find it quickly matters more than trying to commit it to memory.

This is also why the single best habit is to store your number where you can always get to it, rather than relying on recall. Your own contact card, your network's app, and a note kept safely all serve this purpose, and between them they cover every situation — phone in hand, phone lost, or signing up for something that demands your number on the spot. Treating your number as a saved reference rather than something you ought to remember takes the pressure off entirely, and means the next time someone asks, you can find it in seconds without the awkward pause.

#Your number in international format (+44)

Sometimes you need your number not in its usual UK form (starting 07…) but in international format, which starts with the UK country code +44. This comes up when you sign up for services that ask for a number with a country code, when someone abroad needs to call or message you, or when an app (including many messaging and two-factor-authentication services) wants the international version. Converting is simple: take your normal UK mobile number, drop the leading 0, and put +44 in front. So a number like 07700 900123 becomes +44 7700 900123. The digits are otherwise identical; you're just replacing the national '0' prefix with the international '+44' that tells networks anywhere in the world it's a UK number. Knowing this conversion saves confusion when a form rejects your number for 'wrong format' — it usually just wants the +44 version.

It's worth being comfortable with both forms, because you'll be asked for each at different times: UK businesses and contacts generally use the 07… format, while international services, travel bookings and many apps prefer +44. Both reach exactly the same phone; they're just two ways of writing the same number. If you ever store your number for others, saving it in the +44 international format is a small kindness that makes it work reliably whether the person calling you is in the UK or abroad. For more on how UK numbering and prefixes are structured, our 07 mobile prefixes explained guide gives the background to what the digits in your number actually signify.

#Finding your number when your phone is lost, broken or dead

A trickier situation is needing your own number when you can't access the phone at all — it's lost, stolen, broken, or simply out of charge. This is exactly when people most need their number (to report a loss to their network, or to give to the police), and exactly when the on-device methods don't help. Fortunately, there are routes that don't require the handset. The most reliable is your network's online account, which you can log into from any computer or another phone: your number is displayed there along with your account details. If you've saved your number in an email signature, cloud contacts, or a notes app that syncs to other devices, you can retrieve it that way too. And anyone you've recently called or messaged will have your number on their phone, so a quick ask to a friend or family member works even when your own device is unavailable.

This situation is the best argument for the advice in this guide: note your number down somewhere independent of the phone itself. Whether that's your network account, a written note kept safely at home, or a synced contact entry, having your number recorded somewhere you can reach without the handset turns a stressful 'I've lost my phone and don't even know my number' moment into a quick lookup. If your phone has genuinely been lost or stolen, knowing your number lets you contact your network promptly to bar the SIM and protect against misuse — and being able to act fast matters, because a lost phone can be a route to other accounts. If you start receiving suspicious contact afterwards, our spoofed UK numbers guide explains how displayed numbers can be faked and why you should still judge each contact on its behaviour.

#Save your number so you're never caught out

Once you've found your number, the smart move is to make sure you never have to hunt for it again. On iPhone, open Contacts, find your own card at the top, tap Edit, and add or confirm your number — it'll then be there whenever you need it. On Android, you can add yourself as a contact, or simply keep your number noted in a secure notes app. Some people also keep it written down somewhere safe at home, which is genuinely useful if your phone is ever lost, stolen or dead and you need to tell your network or the police your number. It only takes a moment, and it turns the mildly embarrassing 'I don't know my own number' moment into a thing of the past.

A small word of caution on the flip side: while it's fine to save your number for your own reference, be a little thoughtful about where you share it. Your mobile number is a piece of personal data, and entering it into every online form, competition and public profile is one of the main ways numbers end up on marketing and nuisance-call lists. So know your number, share it freely with people and services you trust, but be selective about broadcasting it widely. If you do start getting unwanted calls and texts, our who called me guide explains how to identify and deal with unknown callers, and how to cut down nuisance contact over time.

#Bottom line

Forgetting your own mobile number is completely normal, and finding it takes seconds. On iPhone, go to Settings > Phone > 'My Number' (or check your contact card); on Android, look under Settings > About phone > Status > 'My phone number'. If the settings show 'Unknown', dial your network's short code or text your provider, log into your network's app, or simply call or text a friend and read your number off their screen — that last trick works on any phone and network. Remember that Dual SIM and eSIM phones have a separate number per line, and that an eSIM uses your normal number just like a plastic SIM. Once you've found it, save it in your own contact card so you're never caught out again. For related help, see our guides to UK mobile networks by prefix, eSIMs, and checking your data balance.