I have a Samsung S3 with Android 4.04 and to get on my WiFi at work I need to install a certificate .p12 file. So, I navigate to "Security and lock screen"-->"Install from device storage." BUT instead of giving me a field to specify the location of my cert ( on /mnt/extSdCard ) it just says "No certificate found in USB storage."

There are some USB devices ( called "UsbDriveA" through "UsbDriveF" in my /mnt folder) but I cannot copy the cert onto them because they are read-only.

So, how do I get this certificate imported? I tried using "Android Certificate Installer" from the app store and that didn't work for me either: it launches a browser and the browser fails to prompt for the cert password.

2 Answers 2


I figured out a workaround. The workaround is to download a File Manager tool and then double click the .p12 cert, which opens up and prompts for the password. I still don't know why the control panel doesn't do what it suggests, but at least I found a solution.

  • If you don't know which file manager to use - I successfully applied the workaround via OI File Manager - OI FIle Manager seems to be open-source and comes with sane permissions. Nov 27, 2013 at 21:54

My guess is that it wants the cert to be in a particular spot (and possibly to have a particular name).

From Google's support pages, we see that the cert has to be at the root of your phone's INTERNAL storage, not external.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .