The first time I had a samsung phone I noticed after about two weeks that every single word I typed into any application was being collected and sent to a third party whose privacy policy said it was used to collect data about my interests, my social life, to make guesses about my intelligence level and education, and that the data would be sold for "market research" among other things.

No user would ever suspect that the keyboard that came with their cell phone would be letting third parties read all their texts and emails to do those things. I'd assumed the keyboard was just a part of the OS. I only found out after I just happened to long press a key long enough to get an "about samsung keyboard" window and clicking around to find a privacy policy that said which company they were sending keystrokes to, and then reading that company's privacy policy.

I immediately found an open source keyboard to replace samsung's with. I'll say one thing for them, collecting everything everyone types into their devices meant that the samsung keyboard had really good spellchecking/predictive text capabilities. I'd never go back to using it, but there are times I wish the keyboard I replaced it with had a better spellchecker.