There are many different mobile phone deals that offer a SIM card with a mobile handset. These deals are mostly based on a long term commitment through the use of a contract. This can be discouraging to mobile phone users who would like to have the freedom to change service providers as they see fit. Signing a contract with a service provider normally binds mobile users to that service provider until the end of the contract duration. This prohibits mobile users from switching to another service provider.
SIM only deals on the other hand give mobile phone users the freedom they long for. Mobile phone users of sim only deals are provided with only a SIM card that they are free to use in any handset. There are no contracts and no long term commitments. If a mobile user is unsatisfied with the services of a service provider, all he needs to do is to replace the SIM card of that provider with a SIM card from another provider.
The benefits of using SIM only deals are many – freedom, flexibility, affordability, free calling minutes and free text messages. Some service providers even provide discount to users of SIM only deals for telephone calls made to another network as well as lower rates per minute and text message.
Many service providers provide mobile phone users with a trial period in which they provide mobile phone users with a SIM card that they can use for a limited amount of time. Some service providers offer 14-days while others offer 30-days. During the trial period, mobile phone users are given the opportunity to experience all of the perks and benefits of being a SIM only deal user of that service provider. If at the end of the trial period, the user is satisfied with the services, he may continue with the service provider but has the freedom to stop anytime he wants. But if he is not satisfied, he is free to choose another service provider.
With a regular mobile phone contract, mobile phone users might end up paying huge bills on a monthly basis. SIM only deals is the best way to prevent this.

