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by dmitrygr 2250 days ago
Your phone's Bluetooth scanning IS always on if it's an iPhone or Android. Always. By default.
2 comments
Taniwha 2249 days 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

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barbegal 2249 days 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.
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dmitrygr 2248 days ago
it is on just at a lower duty cycle.

source: worked on this for a few years at googl, both chromeos and android

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