How can I use the inputted Phone Number to the other Screens?

[astudentfromtup]

~For Context~

I'm developing an app for our thesis in where it should send the status of the device and battery status via SMS by using a GSM Module. (From GSM to Notification in app)

~Question~

What I would like to know is do I need some sort of extensions or do I need to use some sort of database in order to get the inputted phone number from the other page?

~Example~

Example Phone Number

Next Screen but still using the same number as the last screen to use by the buttons

Any suggestions and help will be much appreciated!

[RamNaresh]

Calling new screen with parameter.

[Peter]

Do you have to use multiple screens? If not, don't. Use virtual screens.