If so, your phone will probably be blocked by a wireless service provider and you must unblock it via a mobile phone unlock service before it will work on another network. If your mobile phone has a contract, it usually not a problem to unlock the phone. Just call your network and request removal. Typically, these unlock codes, which are a number of numbers that can be entered into the phone using the phone keypad to remove network restriction and allow the use of other national and foreign networks. Unblocking based on IMEI number. Important. Please read before ordering: Order this service only if your phone is from the Optus Australia network. Mobile phones on prepaid plans are usually connected to a network, but if you were on the same network for a while, you can usually call mobile phone companies. In addition to discounts to unlock multiple devices, we also offer regular (up to 50%) significant discounts on selective unlocking services. Therefore, you should stop here regularly. Price Of Unlocked Iphone 8. Yes No Ask Eric Your Own Question Eric, Android Experts Category: Mobile Phones Satisfied Customers: 5132 5132 Satisfied Customer Experience: 3 years as Android developers, complete detailed knowledge of all Android devices and the operating system Eric is now available online New Question Answered Every 9 Seconds Share This Discussion How JustAnswer Works: Ask an Expert Experts are full of valuable knowledge and willing to help with any questions. In some cases, this has to do with the underlying network frequencies, but often it is also easy to prevent you, the consumer, from the network. If a phone is connected to a network, it prevents another SIM card from operating, not just from local competitors - which unlocks your Telstra device, meaning you can save money for foreign Roaming. We developed a robust service for years which uses a comprehensive network of suppliers and our customers, the lowest prices, fastest and the most reliable mobile phone locking service available online is guaranteed.