At the end of every month, mobile phone users are billed an amount, as per the usage or the plan they have opted for. In order to continue using the carrier/operator services, the bill needs to be paid by the specified date on the bill. Not very many people would get to know if the bill amount that they pay is commensurate with their needs or not.
However, if the same could be ascertained, it could end up altering the actual bill amount. Even if the variation is about $15-$20 a month, and if it’s not around a brand new phone that is a part of the deal, there is a high degree of probability that the user is paying more than what is required.
Right now in 2026, you can get unlimited calls, unlimited texts, and 60 to 100GB of fast 5G data for under $10 a month from networks that run on the same masts as EE, O2, Vodafone, and Three. The signal is the same, calls are the same, internet services are the same, so why such a big difference in the price?
According to Uswitch, switching from a standard pay-monthly handset contract to a SIM-only deal could save you as much as $304 a year, which calculates to over $25 a month.
Now, in this article, I will tell you exactly how to do it. And the best thing is you can do it without even losing your phone network, even for a second.
Why Your Phone Bill Is So High
Most people in the UK are using one of two types of mobile deals.
Handset Contract
The first is a handset contract, this is where your phone company gives you a brand-new phone and spreads the cost of it across your monthly bill over 24 months.
So if you are paying $45 a month, maybe $20 of that is actually for the phone itself, and only $25 is for your calls and data. That makes sense while you are paying off the phone.
The problem is, most networks quietly move you onto a rolling SIM-only plan when the 24 months are up, but they do not always drop your price. So you end up paying phone-plus-SIM prices forever, even though the phone is long paid off.
SIM-Only Deal
The second type is a SIM-only deal from a big-name network like EE, O2, Vodafone, or Three directly.
These are cheaper than handset contracts, but they are still often more expensive than they need to be, because you are paying a premium for the brand name.
What most people do not know is that there is a third option: smaller networks called MVNOs (Mobile Virtual Network Operators). These are companies like Smarty, giffgaff, iD Mobile, Voxi, Lebara, and Tesco Mobile.
They do not own their own brands; they rent space on EE’s, O2’s, Vodafone’s, or Three’s masts instead. That means the signal you get is identical to the big network. But because they do not have huge marketing budgets, flagship stores, or enormous overheads, they pass the savings on to you.
As of 2026, Smarty charges $12 a month for unlimited data on a 12-month contract. Voxi charges $15, and iD Mobile charges $16.
How to Cut Your High Phone Bill
Now, let me tell you in steps how to cut your phone bill by switching your networks.
Step 1: Check What You Are Paying Right Now
Before you switch to anything, find out exactly what your current deal costs and when it ends.
You can do this in two ways:
Option A: Log in to your network’s app or website and look at your current plan details.
Option B: Text the word INFO to 85075 from your phone. You will get a free text back within seconds telling you your current contract end date and whether there are any early exit charges.
So, if you are still in a contract, for example, 8 months into a 24-month deal, leaving early might cost you a fee. In that case, it might be worth waiting until your contract ends before switching.
Step 2: Check Your Data Usage
Before you pick a new plan, it helps to know how much data you actually use each month. There is no point paying for unlimited data if you only use 8GB.
- On iPhone: Go to Settings > Mobile Data. Scroll down to see how much each app has used.
- On Android: Go to Settings > Network & Internet >Data Usage. You can see your monthly total there.
Once you know your number, you know what plan to look for.
Step 3: Find a Better Deal
Now go to a comparison site and see what is out there. Good ones to use are Uswitch, MoneySuperMarket, or Compare the Market. All of them are free to use, and they show you deals ranked by price.
Here is what to look out for when comparing: Which big network does it run on? Are there annual price rises? Is roaming included? And lastly, is there a contract or not?
As of mid-2026, examples are:
- Smarty– Unlimited data, calls & texts, 12-month contract: $12/month (runs on Three/Vodafone)
- Voxi – Unlimited: $15/month (runs on Vodafone)
- iD Mobile – Unlimited: $16/month (runs on Three)
- Tesco Mobile – 50GB: around $10-12/month (runs on O2)
- giffgaff – Flexible monthly plans from $6/month (runs on O2)
Compare that to paying $25-35 a month on a big-name network for a similar allowance.
Step 4: Get Your PAC Code
Once you have found a deal you want to move to, you need something called a PAC code (Porting Authorisation Code).
This is the code that lets you take your current phone number with you to a new network.
To get your PAC code, just text the word PAC to 65075 from your current phone. Within about one minute, you will get a text back with your code, which is usually a mix of letters and numbers.
That same text will also remind you of any exit charges, so you will know exactly where you stand before moving forward. Your PAC code is valid for 30 days, so you have plenty of time to use it.
Step 5: Order Your New SIM and Give Them the PAC Code
Now go to the website of the network you have chosen, pick your plan, and order a new SIM card. During the sign-up process, they will ask for your PAC code. Give it to them there and then.
Once your new provider has the PAC code, they take care of everything else. They contact your old network on your behalf, arrange the switch, and you do not have to call anyone or do anything else.
Most new SIM cards arrive in the post within 2-3 days.
Step 6: Check Everything Is Working
Once you have put the new SIM in and restarted your phone, check a few things to make sure everything has gone through properly:
- Look for signal bars and a 4G or 5G icon at the top of your screen
- Turn Wi-Fi off temporarily so you can confirm mobile data is working on its own
- Make a quick call to someone and send a test text
- Check that your old number is the one showing up when you call someone
If anything is not fine, the simplest fix is to restart your phone. If there are settings to update, your new network will usually have sent you a text with instructions during the setup process.
