The ETravelSim Vatican City eSIM connects in St. Peter's Square, the Vatican Gardens, and most outdoor Vatican areas with strong 4G/LTE. Indoor signal weakens inside the Sistine Chapel, deep within Vatican Museums, and inside St. Peter's Basilica because of the thick ancient walls and ceiling depths — this affects every Italian carrier equally. During peak hours from 10 AM to 6 PM in summer, networks across the Vatican area get congested due to the volume of tourists. Download tickets and offline maps before entering.
