International roaming sim cards will only work with an unlocked mobile phone. The small fee often charged to unlock a phone is well justified when compared to the savings on roaming charges you are going to make. Be aware, unlocking a mobile phone may invalidate its warranty.
A locked mobile phone or SIM lock, simlock, network lock or subsidy lock, is a capability built into some mobile phones by mobile phone manufacturers. Mobile network providers use this capability to restrict users from using a mobile phone with a different mobile phone networks or global sim cards. Nearly all mobile phones can be unlocked to work with multiple mobile phone networks or world sim.
The main reason that networks lock a mobile phone is to offer the devise at a discounted price in exchange for the customer taking on a contract. The subsidised mobile phone is then paid for by the contract over a period of time.
Mobile phone unlocking is often offered by smaller, independent mobile phone shops, mobile phone accessory shops or by website based businesses.
Website services require that the individual who wishes to unlock a handset provide their IMEI number along with a few other details to the company, either via email or a website. The company will then provide the unlock code for the handset.
Shops offer unlocking services that require the mobile phone to be unlocked by a technician. Other companies sell unlocking hardware, including devices which fit between the mobile roaming world SIM card and the phone to spoof the original network id and edit the handset's firmware. The pricing for unlocking a device will vary depending on the network it is locked to and the model itself, as each unlock code is unique to the handset.
If you have tried using a mobile roaming sim card in a phone you think may be lock, you could get one of the following messages:
Sim Card Not Accepted
Enter Restriction Code
Enter Special Code
Enter Subsidy code
Enter Subsidy Password
Contact Service Provider
It's not illegal to unlock mobile phones. Your current mobile phone network may be able to unlock your phone with an unlocking code. If not, there are plenty of businesses that can do it for you. Once you have unlocked your mobile phone you can use one of the roaming international sim cards to save on roaming charges.
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Make sure you use one of these mobile phone unlocking services for your handset and also ensure that the handsets youâ€™ve chosen, supports a global roaming sim card. The mobile roaming sim world can be a trick place to navigate and we try to make it easier.