Amplified mobile phones are simplified extra loud mobile phones with significantly greater volume output for speech and ringtones. Generally, they can be used with any service provider’s SIM card, on a current contract or Pay-As-You-Go. Simply insert the SIM card to use the mobile phone. Some amplified mobile phones have additional tone control to focus on different frequency ranges such as higher frequencies that enable easier speech recognition. Most have large buttons and clear display screens for easy calling and texting with most of contemporary phones complex features removed to make them simpler to use and less confusing, making them a popular mobile phone choice for the elderly or hearing impaired.