Whether you're switching to the Vodafone network, reactivating an old phone or visiting the UK with your mobile, a SIM pack gives you everything you need to connect your existing phone to our products and services. You can also pop the card into a new handset from the fantastic range of pay as you go phones.

Once you receive your new SIM, just pop it in your existing phone - it's that simple. Then you can enjoy all the benefits of Vodafone - including great network coverage and UK call centres.

Our Pay monthly SIM Only plans gives you the freedom of a Pay as you go plan. And it also comes packed with more minutes and texts for your money than a contract phone. Then there's the convenience of keeping your existing phone and number. Plus if you take out the 30 day plan you can cancel with just 30 days notice.

Our Pay as you go SIM only plan gives you great value extras like Text Unlimited and Free Weekends. Just pop the SIM into your existing phone. You can also call any UK mobile or standard landline for just 20p a minute - any time. Texts are just 10p each.

Unlocking your phone

To see if your phone is locked, just pop the SIM in. Your phone is locked if the screen displays ''blocked'', ''barred'' or ''SP lock''. If it''s locked, your SIM won''t work straight away.

To unlock your phone, call your current network provider or pop into a store. (Your current network may charge for this.)

Keep your number

The great thing about our pay monthly SIM Only plan is that you can keep your existing number. This means you don't need to update your friends and you won't miss any important calls when you switch.

Keeping your existing number is simple:

• Ask your current network for a Port Authorisation Code PAC)
• Enter your existing number and PAC when you order your new SIM from Vodafone
• We'll email you with the date your existing number will be activated by Vodafone
• Your PAC is valid for 30 days.