Calls echo on speaker & there's tons of ads on the free version. You can't turn off the screen while on a call so it drains your battery & shows you ads. Update: won't let me get verification texts without premium. Really underhanded. Update 3: bought minutes & couldn't use them to send or receive calls (wifi wasn't strong enough & I missed an important call back). Update 4: my dad called on my bday & I didn't get a notification until 4 days later. Text to my friend didn't send or let me know.