Amount of numbers in memory
The maximum amount of phone numbers that a user can store in the phone's memory. To make a call to one of these numbers, you do not need to remember complex combinations of numbers, just select the desired contact and press the call button. Usually, the numbers that you have to use most often are stored in memory: numbers of family members, friends, etc.
Number of telephone lines
The number of telephone lines directly determines how many different telephone numbers can be "attached" to the device. Support for two or more lines can be a good solution for users who want, for example, to receive business calls on one number and personal calls on the second, but at the same time use only one telephone set. Each of the numbers in this case will have its own ringtone.
