Some devices come with a pen shaped touch accessory. Alternatively, we can buy one. Also, may have a pen on it as well. Given, proper netiquette to carry something to tap with.
Phablet netiquette. So, culture of phones big enough to be tablets. A society of people who use big smartphones. We do it a little different. Hence, tips for productivity. So, tech and business people use them more than others.
A case to carry big mobile helps. Protection provides freedom from harm. Next, saves us from a broken device. Then, a useful accessory many people need or want. Given, proper netiquette to use protection in principle.