Fault · Cellular
SIM not detected
“No SIM” with a card that works in another phone.
View the guide steps online with your BoarDray account.
Covered on 158 models
- Samsung94With guide
- iPhone43With guide
- iPad21With guide
How to approach it
The SIM reader gets its power (VDD_SIM or UIM, 1.8 V or 3 V) from the baseband PMU and talks to the baseband over clock, reset and data; a detect line signals that the tray is inserted. A short on the SIM supply can be in the baseband PMU itself. On stacked boards, the lines cross the interposer.
Other faults in Cellular
- No IMEI or modem not detectedView fault
- IMEI present but no signalView fault
- Weak signal or missing bandView fault
- GPS doesn't get a fixView fault
Where to find it
- By modelEach model lists the guides that apply to it.
- By familySamsung, iPhone, and iPad already have the guide.
Models where it is covered
Samsung · 94 models
iPhone · 43 models
iPad · 21 models
See inside every board
Sign in to open the SIM not detected guide next to the schematic and board view.