The Vodafone 155 features a larger than average keypad and is designed for anyone that has dexterity problems as the large keys make dialing numbers easy. To prevent pocket dialing or unintentional use there are sliding keys on the side to lock it and the phone comes with a charging dock so no need to try and attach a fiddly charging cable. The phone is designed to be heard loud and clear and is compatible with hearing aids. This phone is the perfect companion if you have a vulnerable or elderly relative as it has an SOS button. You assign an emergency number to the button and when the button is pressed an audible alarm is sounded to let people know nearby and the phone calls and texts the emergency number too. This phone is designed to be as simple as they come with just text messaging and calling functions as well as a radio for listening to music.