3 ms·

Not necessarily. Loads of buildings are faraday cages by accident. I know my old school gym completely blocked cell signal due to how it was built

• bombcar 5y ago
  Many big-box stores effectively block most if not all cell signal; you might not notice because Home Depot provides free wifi.
  • xeromal 5y ago
    I assume it's unintentional though right?
    • bombcar 5y ago
      I suspect so, but I wouldn't put it past Costco to intentionally block most of price checking say ... (Costco being the only one I've been in that didn't provide store-wide free wifi.)