4 ms·

Your phone's Bluetooth scanning IS always on if it's an iPhone or Android. Always. By default.

• Taniwha 7y ago
  Yes, and it has a honking big battery that you charge every day or so. A card with a proposed 6 month battery life with receiver PLLs that are always spun up probably needs more battery than you can fit in a tiny thin card
• barbegal 7y ago
  That may be true when the screen is on, but from my experience scanning is not switched on in sleep modes on iPhones and most Android phones. I don't have definitive proof of this but I have never seen a modern phone be able to reliably scan whilst in sleep mode for any long period of time.
  • dmitrygr 7y ago
    it is on just at a lower duty cycle. source: worked on this for a few years at googl, both chromeos and android