SIM Free Mobile Phones – Allow you switch to network providers of your choice
Before any attempt is made to understand the nuances of SIM free mobile phones, the user must know the definition of a SIM or Subscriber Identity Module. In local parlance you can say that the SIM is a detachable card which is inserted into your mobile phone and which identifies you as a mobile phone subscriber of a particular network service provider.
The mobile phone industry in the UK is extremely subsidized, which allows a subscriber to easily utilize an unlocked mobile phone equipped with an existing SIM card. Information like your SMS messages numbers and phone book contacts is stored in the SIM of your mobile phone.
SIM free mobile phones have an in-built capacity which allows the subscriber to change networks without any hassles as your mobile is not locked to provide the services of a specific network service provider. Subscribers can buy talk time as per their individual needs.
There are two kinds of mobile phone deals that are popular in the UK. The monthly payment mobile phone deal allows you to avail a limited or unlimited number of hours of calls for a fixed monthly payment. Pay-as-you-go mobile phone deals are suitable for those whose monthly usage is limited. Under this scheme, you are required to avail credits for a specific number of call minutes, test messages and to avail other features. These two services are provided to users with SIM phones.
What will you do in case you want to switch over to SIM free mobile phones but your contract still has time before it expires? SIM free mobiles phones can come to your rescue. You can call it a offline or unlocked mobile phone, which allows you to use your existing SIM card by inserting it in the new handset you have purchased. You can buy a SIM free mobile phones of different brands such as Motorola, Nokia, LG, Samsung, and Siemens.
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Handset unlocking - SIM free handsets - Global SIM
Maybe I'm interpreting your statement "The mobile phone industry in the UK is extremely subsidized, which allows a subscriber to easily utilize an unlocked mobile phone equipped with an existing SIM card." incorrectly.The fact that the UK handset is highly subsidised means that handsets are locked to a particular network, therefore PREVENTING the use of another SIM card. The network needs to recoupd the money they have spent on giving you free handset ir subsidised handset and hence lock it to their network so you spend airtime with them and "pay back" the subsidy over the contract period.
Handsets can be unlocked at any time of the contract so you can use "normal" networks SIMs or global SIM cards e.g. www.globalsimcard.co.uk when travelling overseas.
Being able to swap SIMs does mean the user has flexibility and more choice provided they can unlock the handset. Many network operators charge a lot to do this, and take a long time do do it so as to discourage unlocking being done. Unlocking can be done online or using devises that are inserted into the SIM slot with the SIM card. e.g. www.simpig.co.uk
The disadvantage of using different SIMs is that you have a different number. However, this "disadvantage" is often far outweighed by the savings or flexibility offered.