Do you ask yourself, “What phone do I have?” Many people forget the exact model of the handset in their pocket. They need it to buy a case, claim on insurance or switch networks. This guide shows you the fastest ways to find your model on iPhone and Android. Next, it explains PAC codes and SIM registration in the UK. Then switch networks and protect your number with confidence.
What Phone Do I Have? Check on iPhone
On an iPhone, the answer sits in Settings and takes less than a minute to find. Open Settings, then tap General, then About. The Model Name row shows the name, for example iPhone 13 or iPhone 15 Pro. The Model Number row shows a code that starts with M, for example MTUS3LL/A. Tap it once, and it changes to a shorter code that starts with A, for example A2849. Use that A-number to check compatibility, buy parts or search for a case. The same screen also shows the serial number, iOS version and storage size. In short, Settings gives you everything you need in one place.
What Phone Do I Have? Check on Android
On Android, the path varies a little by brand, but the answer stays in Settings. Open Settings, then look for About phone. On some handsets it sits under System, and on others it reads About device. Tap it, and you will see the model name and the model number. The model name reads like Pixel 8, while the model number looks like a code. If you cannot see About phone, use the search bar at the top of Settings and type “model” or “about”. The model name tells you the handset, and the model number pins down the exact variant.
What Phone Do I Have on a Samsung Handset?
Open Settings, then tap About phone. You will see the handset name, for example Samsung Galaxy S23 Ultra, and the model number below it. Samsung model numbers usually start with SM-, for example SM-S918B. That code is the most accurate identifier, because it tells you the exact version and sometimes the region. Use the model number, not just the name, to order a battery, a screen or a case. The same screen also lists the IMEI number, which helps if you report the handset lost or stolen.
Find Your Model Number and IMEI
The model number matters more than the name when you need parts or support. Two handsets can share a name yet differ inside, so the code settles it. Search the model number on the maker’s support site to confirm the variant. Next, find your IMEI: open the dialler and enter *#06#. The handset shows a 15-digit code on screen. The IMEI identifies your individual handset, and networks ask for it when you report a loss. Treat it like a serial number, and never post it in public.
What Phone Do I Have If It Will Not Turn On?
A dead handset can still tell you its model, so do not panic. First, look at the back of the device. Many Android handsets print the model number there in small text, and some print it inside the SIM tray. On iPhones, the model number sits in tiny print on the back or inside the SIM tray. Next, check the original box: it lists the model name, the colour and the storage on a label. If you bought it on contract, your network account or purchase receipt lists the model too. Finally, sign in to the Google or Apple account linked to the handset. It lists your devices with their names and models.
Model Name vs Model Number: What Is the Difference?
The model name and the model number answer two different questions. The model name is the marketing name, such as Galaxy S24. It tells you which handset you own in plain words. The model number is a technical code, such as SM-S921B or A2849. It identifies the exact hardware variant and region. If you still ask what phone do I have, check Settings again. The model number gives the final answer. Use the name when you talk about the handset. Use the number when you buy parts, check compatibility or speak to support.
What Is a PAC Code?
What is a PAC code? A PAC code is a Porting Authorisation Code. It lets you keep your mobile number when you switch networks in the UK. It is nine characters long: three letters followed by six numbers, for example ABC123456. Give the code to your new provider, and they arrange the transfer. The switch usually completes by the end of the next working day. Your old plan ends automatically, so you do not need to ring up and cancel it. Also, asking for a code does not commit you to leaving. If you change your mind, nothing happens, and your plan carries on.
How to Get a PAC Code in the UK
Getting a PAC code is free, and the text method works on every UK network. First, text PAC to 65075 from the SIM you want to keep. Your current provider must reply within one minute. The reply holds your code and any early termination charges that apply. Next, give the code to your new provider when you sign up. They handle the transfer, and your number moves across by the end of the next working day. The code stays valid for 30 days. If it expires before your new provider uses it, text PAC to 65075 again for a fresh one. Also, you need to stay in the UK on the day of the transfer.
What the Reply Includes
The reply must include the PAC code itself, the expiry date and any charges you owe if you leave early. If you want those details without switching, text INFO to 85075 instead. That reply shows your contract end date and your current monthly spend.
PAC or STAC: Which One Do You Need?
A PAC code keeps your number, while a STAC code gives you a fresh one. STAC stands for Service Termination Authorisation Code. If you want a new number with your new network, text STAC to 75075 from the SIM you are leaving. Your provider replies with the code, and your new provider uses it to end the old plan. So choose PAC when you want to keep your number, and choose STAC when you want a clean start. Both codes last 30 days, and both are free to request.
Registration for SIM Card: What the UK Really Requires
Registration for SIM card use works differently in the UK from most of the world. The UK has no law that forces you to register a pay-as-you-go SIM with an ID document. You can buy a prepaid SIM in a shop or online. Use it straight away, with no passport and no proof of address. Over 150 countries now demand ID for a local SIM, but the UK does not.
A contract plan is different. Networks run credit and identity checks first, so they will ask for your name and address. Some networks also ask for details when you top up or manage an account online. But that is their own policy, not the law. Network rules can change, so check with your provider if you are unsure.
SIM Sizes, eSIM and Moving to a New Handset
Most handsets today take a nano-SIM, while older models take a micro-SIM. Your network will send a smaller SIM if you ask. An eSIM is a digital profile that you download, so there is no plastic card at all. To move to a new handset, back up your old one first. Then sign in to the same Google or Apple account on the new one. Your contacts, photos and apps follow the account, not the SIM. Also, keep the old handset until the move is done. You may need it to confirm a code or a transfer.
SIM-Swap Fraud: How to Protect Your Number
SIM-swap fraud starts with a trick, not a hack. A criminal gathers a few details about you. Then they persuade your network to move your number to a SIM they control. Once they hold the number, they can reset passwords and receive security codes. First, set a strong PIN or password on your network account, and never share it. Next, turn on two-factor authentication in an authenticator app where you can. App codes do not travel with the number, so they stay safe. Also, watch for sudden loss of signal, which can mean your number moved. If that happens, call your network at once. For the wider tricks behind these scams, read our phishing scams guide. It shows how fake messages steal the details that make a swap possible.
What Phone Do I Have? FAQs
What phone do I have if I bought it second-hand?
Check Settings. On iPhone, go to General, then About. On Android, go to About phone. If it will not turn on, read the model number on the back or in the SIM tray.
What phone do I have — can a website tell me?
A website can only guess your model from the browser. It cannot read your serial number, and Safari hides the model altogether. So use Settings for a certain answer.
How long does a PAC code last?
A PAC code lasts 30 days. If you do not use it, it expires. Text PAC to 65075 again for a fresh one.
Do I need ID to buy a SIM in the UK?
No. UK law does not require ID for a pay-as-you-go SIM. A monthly contract is different: the network runs credit checks first.
Can I keep my number if I switch networks?
Yes. Text PAC to 65075 and give the code to your new provider. Your number moves across by the end of the next working day.
What is the difference between a PAC code and a STAC code?
A PAC code keeps your number when you switch, while a STAC code gives you a new number. Text PAC to 65075 or STAC to 75075.
So, what phone do I have? Now you can answer that question in under a minute. First, check the model in Settings and note the IMEI somewhere safe. Next, keep your PAC code handy when you switch, and guard your number against SIM-swap tricks.