Short answer: AirDrop and Personal Hotspot are both short-range wireless features, but they fail in opposite directions. AirDrop's symptom is usually that the phone cannot be found, which is a receiving setting or a radio that is busy. Personal Hotspot's symptom is usually that devices cannot join, which is a carrier allowance, a password, or a band. Sorting out which feature you actually have a problem with is the first step.
AirDrop: it cannot find, or the transfer fails
| Symptom | Most likely cause | First move |
|---|---|---|
| The other person is not in the AirDrop sheet | Receiving set to Contacts Only and they are not a contact | Set the receiver to Everyone for 10 Minutes and retry |
| Nobody appears at all, either direction | Bluetooth or Wi-Fi off on one end | Both radios on at both ends |
| It appears, then the transfer stalls or fails | The devices moved apart, or a hotspot or VPN is occupying the path | Keep the devices close; turn off Personal Hotspot and VPN |
| Only one specific person never appears | Settings on their device, or a contact mismatch | Have them switch to Everyone for 10 Minutes as a test |
| It worked before and stopped after an update | A reset receiving preference, or a stale radio state | Check the AirDrop receiving setting, then restart once |
AirDrop is Bluetooth to find, Wi-Fi to carry. It does not need a Wi-Fi network and does not use your data plan, but the Wi-Fi radio has to be on for the peer-to-peer link. That is why "turn Wi-Fi off to save battery" quietly breaks AirDrop.
The receiving setting is the one people miss because it is not in Control Centre in an obvious way: Settings → General → AirDrop. *Contacts Only* is the default in many configurations, and it means a sender who is not in your contacts will not see your device at all — no error, no prompt, just an empty list. Switching the receiver to *Everyone for 10 Minutes* is both a fix and a diagnostic: if it works immediately, the setting was the whole problem.
Two more things worth knowing. A phone running Personal Hotspot is occupying the radio path AirDrop needs, so turn the hotspot off and retry. And moving the two devices more than a few metres apart during the transfer is enough to break the peer-to-peer link, because that link is direct and short-range rather than routed through a network.
Personal Hotspot: devices cannot join
| Symptom | Most likely cause | First move |
|---|---|---|
| No Personal Hotspot entry in Settings | Carrier has not enabled it on the plan, or a profile or MDM restriction | Check the plan allows tethering; check for a carrier settings update and any installed profile |
| The setting is there, other devices never see it | The hotspot screen was not open, or the phone is not sharing | Open Settings → Personal Hotspot and leave it on screen while the other device searches |
| The device sees it and cannot join | Wrong password, or a band the device cannot use | Re-check the password on the hotspot screen; turn on Maximise Compatibility |
| It connects, then there is no internet | Cellular coverage or a data limit on the plan | Test the phone's own internet first; check any data cap |
| It drops the connection after a minute or two | No device using it, and the phone put the hotspot to sleep | Re-open the hotspot screen, or keep a device actively using it |
The single most common cause of a missing or greyed-out Personal Hotspot setting is not the phone: it is that the carrier has not provisioned tethering on the plan. iOS shows the setting based on the carrier profile, so a plan without hotspot support produces a setting that is absent rather than one that is switched off. Confirm with the carrier, and check Settings → General → About for a carrier settings update, which is also how a newly provisioned allowance reaches the phone.
The second common cause is the band. A hotspot created on 5GHz is faster and shorter-range; a device that only supports 2.4GHz will see the network and repeatedly fail to join. Maximise Compatibility on the Personal Hotspot screen switches the hotspot to 2.4GHz, which is the fix for older laptops, tablets, some car systems and most smart-home devices.
The third is the password, which is shown on the Personal Hotspot screen and can be changed there. A device that has connected before will keep offering the old one, and the failure looks like "it sees it but cannot join". Forget the network on that device and enter the current password.
The fourth is subtler: a hotspot with no client actively using it may be put to sleep, and the connected device then finds the internet gone. Keeping the Personal Hotspot screen open, or having the client do something continuously, is usually enough to keep it alive.
What is not the problem
- "AirDrop needs internet." It does not. It uses a direct peer-to-peer Wi-Fi link, so a phone with no network, no SIM and no data can still AirDrop.
- "Turning off Wi-Fi saves battery without consequences." It breaks AirDrop, wireless CarPlay and AirPlay, and it stops the Personal Hotspot from sharing over Wi-Fi. Bluetooth-only sharing is available for the hotspot but is slower.
- "A VPN fixes AirDrop discovery." A VPN can interfere with the local handshake rather than help it. Turn it off while testing.
- "Bluetooth off is fine as long as Wi-Fi is on." AirDrop needs Bluetooth for discovery, and both radios are required.
Apple's own guidance for AirDrop covers the receiving settings, and its guidance for Personal Hotspot covers the carrier and compatibility conditions. Apple does not publish a range figure for AirDrop — treat any quoted distance as an estimate, and keep the devices close.