You can use "SwitchScan" APK to know if it is patched and the firmware version. You can get the app from Play Store directly. I used it in the mall, and find it one safe.
SwitchScan: goo.gl/FnGnfp
See you!
although i ended up accidentally changing my nand with no way of going back bc i didn't know you needed a gamecube controller to restore it (i have a wii minus/1.1, which doesn't have gamecube controller support)
and if i find the sd card i have my NAND backed up on, i can not only restore the NAND if i solder the right part in, but i can also put my NAND on dolphin, then i can play dolphin online, like PMEX Remix or MKWii Riibalanced