Vodafone UK is a provider of telecommunications services in the United Kingdom, and a part of the Vodafone Group, the world's second-largest mobile phone company. As of March 2014, Vodafone UK has 19.5 million subscribers and is the third largest mobile telecommunications network nationally after EE and O2 (Wikipedia)
Vodafone iPhone unlocking service description (United Kingdom)
iPhoneIMEI.Net is the best one providing unlocking services to help you unlock your Vodafone iPhone easily. No jailbreak or any Softwares are required! All we need is only your IMEI number (Dialing *#06# to get your IMEI)
How does it work?
We will submit a request to Vodafone UK and Apple to remove your IMEI from the locking list. It may take 1-7 working days (Not included Saturday and Sunday) to complete.
Once completed, we will send you an email with subject "Congratulations, your iPhone XX (your model) has been unlocked"! If you received that email, then just simply connect your iPhone to a Wifi network and insert any SIM card. You will be surprised because it works perfectly.
How to unlock Vodafone UK iPhone 7, 6S, 6+ plus , 6, SE, 5S, 5C, 5, 4S, 4, 3GS ?
Step 1: If you are sure that your iPhone is locked to Vodafone UK, you can skip this step. If not, please Check your iPhone carrier / network first
Step 2: From this page, you will see the product name (Here is Vodafone United Kingdom), and all information about your carrier. There is a big input in the left side, you should exactly insert your IMEI number and select your iPhone model. If you've inserted a correct IMEI number, your iPhone information will be appeared at the center blue segment.
Step 3: Once you confirmed the IMEI number and the iPhone model selected are correct, let click the "Unlock NOW" button. You will be redirected to the checkout page, you should provide your billing information here and click "Pay with PayPal".
Step 4: After received your PayPal payment and verified it's clean, we will change your order status to "Processing" and submit your IMEI to Vodafone UK and whitelist it from Apple activation database (You will be received an email for this change). This step may take 1-7 days.
Step 5: This is final step - Complete your unlock! We will send you an email with subject "Congratulations! Your iPhone has been unlocked". When you see that email, just simply connect your iPhone to a Wifi network and insert any SIM card, your iPhone should work instantly!
If it doesn't work, please try to go: Settings -> General -> Reset -> Reset network settings, then try again to connect your iPhone to a Wifi network and insert any SIM card.
(You will not lose your Jailbreak with 2 methods above)
If 2 methods above are not working (Almost of cases happened if you are using iOS 6 or lower), then you have to connect your iPhone to Apple iTunes and restore it to latest iOS version