Brazil VIVO iPhone can be unlocked with factory IMEI unlock. This is the top method used by a lot of Apple customers who purchased a locked smartphone but don’t like to have limits with their mobile operator. Locked handsets can get signal from one carrier only. In other words, your VIVO iPhone 4S will not support Claro SIM, Vodafone and others. You can change this by unlocking your smartphone using an affordable tool such as IMEI unlocking. Other methods will not support iOS 7.0 if you plan to update your iOS 7.1.1 device. It supports all smartphone models including iPhone 4S and 4. This method is also good for different modem versions. How long does it take to unlock Brazil VIVO iPhone 4S? It takes a couple of days. Unlocking service is distant so you can go on with your life while waiting for delivery of your new status. Is it expensive to unlock iPhone by IMEI? No, it is not. Most unlocking packages are affordable and even cheap. How do I order unlock for iOS 7.1.1 iPhone 4S locked to VIVO? Factory IMEI tool supports all version of iOS, including iOS 7.1.1, 7.1 and others. You just have to provide the IMEI number and your email, pay and wait till you are unlocked. Follow the link to a reliable Brazil VIVO iPhone unlocking that has a lot of positive reviews about its services, ask all questions you have before ordering unlock and place your order online. Since this is a remote service you don’t give your iPhone to anyone. Just the IMEI and email, remember this. The company will connect to Apple servers and add your IMEI to the official database of unlocked numbers. You will be emailed about the successful results with details on how to complete the process by plugging the handset to your computer, launching iTunes and inserting any SIM card except VIVO. That’s the end, and you will be permanently unlocked from now on. You will get a chance to switch SIM cards and use different networks, including VIVO, AT&T, O2, Vodafone and others.