Phone slots are mobile-friendly games that run on random number generators...

https://emilysexpertchat.yousher.com/are-mobile-slot-games-fair-or-rigged-unpacking-rng-rtp-and-volatility

Phone slots are mobile-friendly games that run on random number generators (RNG) to ensure fair results. Before playing, check each slot’s RTP—return to player—and volatility to match your style