No mobile phones

☢ radioactive ☢️ radioactive ⚠ warning ☣ biohazard 🚱 non-potable water ⚠️ warning 🚫 prohibited 🔞 no one under eighteen ☣️ biohazard 🚳 no bicycles ⛔ no entry 🚯 no littering 🚸 children crossing 🚭 no smoking 🚷 no pedestrians