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How PAC Codes Work When Switching from Tesco Mobile: Complete Guide

Researched: 22 February 2026

Understanding PAC Codes

A PAC (Porting Authorization Code) is a unique code that allows you to transfer your phone number from one mobile network to another without losing service[1][2]. For Tesco Mobile customers, obtaining and using a PAC code is the essential first step in switching providers while keeping your existing number.

How to Request Your Tesco PAC Code

Tesco Mobile offers several convenient methods to request your PAC code:

Text method: Text PAC to 65075 for free from your old SIM, and you'll receive your code within 60 seconds[3].

Phone method: Call 4455 for free from your Tesco Mobile phone, or 0345 301 4455 from any other phone or landline[1][2].

Online method: Log into your Tesco Mobile account, select 'Manage my details', then 'Request your PAC code', scroll to 'Leaving Tesco Mobile?', select your mobile number, and follow the steps[4].

If you have multiple numbers on your account, the online method allows you to request a PAC for a specific number[4].

Timing and Code Validity

Your PAC code is valid for 30 days from the date you request it[3][4]. If you don't use it within this timeframe, the code expires and you'll remain with Tesco Mobile. If your code expires, you'll need to request a new one from Tesco[4].

Once you submit your PAC code to your new provider, number transfers typically complete within 24 to 48 hours[6][7]. Your old SIM will deactivate automatically on the transfer date, and your number becomes active on your new provider's SIM[6].

For those looking to streamline the entire switching process, services like Join Lodo can handle the paperwork and coordination between providers, making the transition smoother.

Costs Involved

Requesting a PAC code from Tesco Mobile is completely free[2][3]. There are no hidden charges for obtaining or using your code.

Essential Considerations Before Switching

Contract obligations: Don't cancel your Tesco Mobile contract until after your number has successfully transferred to your new provider to avoid service gaps and double billing[5].

Outstanding payments: Ensure you have no unpaid bills with Tesco Mobile, as these can cause delays or fees during the switching process[5].

Unused credit and services: Any unused data, minutes, or credit on your Tesco account will not transfer to your new provider, so use them before switching[5].

Phone unlock status: If your phone is locked to Tesco Mobile, you'll need to unlock it before switching to another network[5].

What Happens During the Transfer

When your number is due to transfer, your phone will lose service temporarily[3]. Simply turn your phone off and back on, then check that you're connected to your new network[3]. You may need to update your number in your phone settings[3].

Troubleshooting Common Issues

If you receive a text from Tesco indicating a problem with your PAC code, consult Tesco's guidance on the issue[3]. If problems persist, contact Tesco Customer Care on 4455 (free from your Tesco Mobile phone) for assistance[3][4].

If you request a PAC code but change your mind, you don't need to take any action - the code will simply expire after 30 days and you'll remain with Tesco[3].

Let Lodo Handle the Switch for You

Lodo is a free AI assistant that compares and switches your mobile, energy, or broadband, without any forms. Just tell it what you need via chat or WhatsApp and it does the rest: finds the best deal, handles the paperwork, and confirms the switch. It takes a few minutes instead of a few hours.

We monitor the market for the newest deals. After switching with us once, we can notify you about a better deal, you confirm with one click and Lodo handles the switching admin.

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How do Tesco Mobile customers request a tesco pac code?

Tesco Mobile customers can request their tesco pac code by texting PAC to 65075 for free from their Tesco Mobile phone, receiving it within 60 seconds, or via the Tesco Mobile app under Manage my account. Alternatively, call 0345 301 4455 or 4455 from a Tesco phone, or use live chat on the website. The code is valid for 30 days.[1][3][5]

How long does it take to get a tesco pac code after requesting?

You receive your tesco pac code within 1 minute or 60 seconds of texting PAC to 65075, or instantly via the Tesco Mobile app. Customer care methods like calling may take 5-10 minutes due to wait times.[1][3][5]

How long is a tesco pac code valid for?

A tesco pac code from Tesco Mobile is valid for 30 days from issuance. If expired, request a new one by texting PAC to 65075 or through your account.[1][3][6]

What is the typical timing for a number transfer after giving the tesco pac code to the new provider?

Transfers complete within one working day if the tesco pac code is given before 6pm Monday to Thursday; otherwise, it may take longer, especially on bank holidays. You'll receive SMS updates, with full activation usually in 24-48 hours.[2][5][7]

Are there any costs involved in getting or using a tesco pac code from Tesco Mobile?

Requesting and using a tesco pac code from Tesco Mobile is completely free with no charges for texting PAC to 65075. Compensation may apply for delays via the complaints procedure.[3][5]

What happens to remaining credit when switching networks with a tesco pac code?

Any remaining credit on pay-as-you-go Tesco Mobile accounts is typically not transferred and may be forfeited upon switching with a tesco pac code. Check your specific plan, as contract pay-monthly balances or obligations must be settled first.[1][5]

Can I get a tesco pac code if my account has debt or is barred?

No, accounts in debt, barred, or business accounts may not be eligible for a tesco pac code immediately; ensure your account is active and in good standing. Contact customer care if issues arise.[1]

What should Tesco Mobile customers do after receiving their tesco pac code?

Provide the tesco pac code to your new provider promptly, along with your number, to initiate the transfer. Keep your Tesco account active until the switch completes to avoid issues.[1][2]

What if there's a problem with my tesco pac code during the switch?

Log into My Account, select Manage my details > Request your PAC code > Leaving Tesco Mobile, or call 4455 from your Tesco phone. If over 30 days old, request a new tesco pac code.[4]

Do contract obligations end automatically when using a tesco pac code to switch?

No, providing a tesco pac code does not automatically end pay-monthly contracts; you must settle any outstanding obligations and cancel separately to avoid charges. Pay-as-you-go switches are simpler with no early termination fees.[5]

Sources

  1. Tesco Mobile Customer Support Documentation
  2. Ofcom Mobile Number Portability Guidelines
  3. Tesco Mobile PAC Code Request Process
  4. Tesco Mobile Account Management Portal
  5. Mobile Network Switching Regulations
  6. UK Mobile Network Transfer Timings
  7. Industry Standard Porting Procedures
How PAC Codes Work When Switching from Tesco Mobile: Complete Guide | Lodo