Multi-choice problem: Continue writing the next sentence in this paragraph:

How to save money on your iphone 
Download vibro. 
If you download it, it will let you call and text for free! But only if you you use that app. Note: this app requires the use of internet.

Available options:
 -You can't use such a service while away from home. Instead, start by visiting the app store and type in " vibro " in the search bar to search for the app you want to download.;
 -Make sure you have a smart phone. If you don't, you'll need some extra charger from the phone bill.;
 -Remember, you can use other operating systems, even if that will not be allowed. To learn how to use vibro, sign up for two ios phones and listen to vibro music on the official apps' platform.;
 -If you're on a restricted data plan, try not to use the app unless you are on wi-fi. Don't download stuff that you have to pay for.;
If you're on a restricted data plan, try not to use the app unless you are on wi-fi. Don't download stuff that you have to pay for.