The most repeated question in our contact form is «How I can unlock my iPhone [operator x] with iOS X and baseband XX.XX.XX? ”, most are looking for an answer related to the jailbreak; A few years ago iPhones could be jailbroken and used with any operator, almost two years ago we have not had any such release.
As a result of this the unlocks by IMEI, which are actually the best than the software release although in exchange you have to pay a price (except if you have finished your contract of permanence). An IMEI unlocking is the unlocking that occurs directly from the operator, which is permanent and forever, you can update your iOS, your baseband, etc. and you don't need jailbreak, it works on all iPhones. In other terminals this would be the equivalent of unlocking by code, in the iPhone it is carried out using iTunes.
Advantages: it is forever, it does not depend on the jailbreak, it allows you to travel abroad and buy a prepaid SIM and have a data connection, and above all, it revalues the value of your terminal, a free iPhone sells much better in the second-hand market than a locked iPhone for a company.
Ways to unlock your iPhone by IMEI:
If your term contract with the operator you can call your company And that they release the terminal that you have bought yourself (paying about € 6 on average), it does not work if your iPhone has had another owner before or you are not a client of that company.
If your contract is still valid, or you iPhone is bought second hand or comes from another country you can buy the release in an online store. The problem used to be the price, which was around € 100, lately stores are appearing that do it for very small prices, for example, liberaiphoneimei.com releases iPhones from Movistar Spain for only €8 and iPhones AT&T USA for € 17 ($ 23) Even the iPhone 5, the truth is that it is the best price I have seen on the internet, but there are many other stores, if you know of a cheaper one, send it to me by email and we will put it in the post. Some releases like those of Vodafone or Orange Spain They still cost around € 150, let's hope they lower the price soon, because for € 8 it is definitely worth it, but for more than € 100 not.
If you have doubts we can make a process tutorial, I have recently unlocked my iPhone by this method and I have the screenshots ready.