Keep Your Existing UK
Number on SecondSim.
Fast PAC Switch.
Transfer your existing UK mobile number from EE, O2, Vodafone, Three, or any UK network for free. Zero signal downtime, no contracts, and next working day transfer under Ofcom Text-to-Switch regulations.
Keep your existing business contacts, WhatsApp chats, and client trust while saving £300+/year on bloated phone plans.
How to Port Your UK Mobile Number
Under Ofcom regulations, switching mobile networks is completely free and protected by law. Here is the entire process from start to finish.
Get Your SecondSim eSIM
Under Ofcom rules, your number must transfer onto an active target line. Pick your plan and install your SecondSim profile in 60 seconds.
Text PAC to 65075
Text the word PAC to 65075 from your old SIM card. It is free and your carrier must text you back within 60 seconds.
Enter PAC in Dashboard
Log into your SecondSim dashboard, click "Bring your number", and enter your PAC. Your number transfers next working day with zero downtime.
Ofcom Number Porting Timetable
UK mobile transfers take one working day under Ofcom rules when submitted before 5:00 PM. Here is exactly when your transfer completes:
| Submission Day & Time | Processing Status | Transfer Completes |
|---|---|---|
| Mon – Thu (Before 5:00 PM) | Processed immediately with carrier | Next Working Day (Tue – Fri) |
| Mon – Thu (After 5:00 PM) | Queued for next business morning | 2 Working Days Later |
| Friday (Before 5:00 PM) | Processed immediately | Monday Morning |
| Friday (After 5:00 PM) or Weekend | Queued for Monday morning | Tuesday Morning |
One plan, three options.
Unlimited UK calls & texts on every plan. No contract, no credit check, cancel whenever.
Pay as you go — cancel anytime.
- Real UK mobile number (non-VoIP)
- Free number porting via PAC code
- Unlimited UK calls & SMS
- Instant eSIM — live in 60 seconds
- Low commitment, cancel anytime
Long-term peace of mind. Works out at £5/mo — 2 months free vs monthly.
- Real UK mobile number (non-VoIP)
- Free number porting via PAC code
- Unlimited UK calls & SMS
- Instant eSIM — live in 60 seconds
- 2 months FREE vs monthly billing
The balanced choice — save 11%.
- Real UK mobile number (non-VoIP)
- Free number porting via PAC code
- Unlimited UK calls & SMS
- Instant eSIM — live in 60 seconds
- Save 11% vs monthly
People who finally switched off
"Running a salon meant clients contacting me 24/7. There's no more evening anxiety when my phone buzzes."
"I've framed it to clients as a priority hotline. Nothing gets lost, and I get my evenings back."
"I juggle a job and two side-gigs without carrying a second phone or signing a contract."
Frequently Asked Questions
Everything you need to know about porting your number to SecondSim via PAC code.
What is a PAC code and how do I get it? +
A Porting Authorisation Code (PAC) is a free 9-character code (format: ABC123456) that authorizes the transfer of your mobile number between UK networks. Simply text PAC to 65075 from the number you want to keep. Your current provider is legally required by Ofcom to text you back within 60 seconds. The code is valid for 30 days.
Do I need to buy a SecondSim plan before I can port my number? +
Yes. You must purchase a SecondSim plan and activate your eSIM before requesting a port. The transfer applies your old number directly onto your active SecondSim line, replacing the temporary number. We cannot initiate an MNP transfer through Ofcom without an active line.
How long does it take to port a number? +
Number porting takes one working day under Ofcom rules, provided your request is submitted before 5:00 PM Monday through Friday. Transfers do not run on weekends or UK Bank Holidays.
Will I lose signal during the transfer? +
No. You will not experience major signal downtime. Your old SIM card remains fully active up until the exact moment of the port. When your old SIM disconnects, restart your phone and your ported number will be live on your SecondSim profile.
Does porting cancel my old contract? +
Yes. Completing a number port triggers the immediate cancellation of your line with your previous network provider under Ofcom regulations. You do not need to call them.
Can I port a VoIP or landline number? +
No. PAC codes only apply to mobile-to-mobile number portability. If you wish to port a UK landline, virtual number, or VoIP number, contact our support team for a manual assessment.
Keep your number & upgrade to SecondSim
Real UK mobile number on Vodafone. Zero signal downtime. 100% money-back guarantee if verification fails within 7 days.