Although relatively new device, the Sprint variant of the Samsung Galaxy S4 mini (SPH-L520) has been getting software updates four times to date, the second and third update is a minor update related to Sprint Spark compatibility. The most recent update was released in late February with NA7 software version. If you are interested to apply this update, you must be willing to lose root access on Sprint Galaxy S4 mini runs L520VPUANA7 baseband.
The NA7 update is not a minor update, but also can not be said as a major upgrade one, because it is still loaded with Android 4.2.2 Jelly Bean. According to its changelog, it brings Galaxy Gear compatibility, the new Samsung’s mobile security called KNOX and enable Wi-Fi calling. So it only beneficial for those who already have those new Samsung smartwatch and also for those who want to make a call over Wi-Fi in locations that previously had limited or no mobile network coverage.
- A Galaxy S4 mini (SPH-L520) runs the previous software update (L520VPUAMK2) and has superuser access.
- Download an app by supercurio called “OTA RootKeeper“, it’s readily available for free at play store.
Keep root on Samsung Galaxy Mega after L520VPUAMK2 official OTA update.
- Ensure that the root remains work, since we will use app that requires superuser access.
- Make sure your phone runs MK2 by going to Settings -> About.
- Run OTA Rootkeeper that you’ve installed before, and tap “Temp. un-root (keep backup)” button, the app will ask for superuser access, just grant it.
- Now initiate an OTA update manually or if you already got a notice just accept it.
- Once the OTA downloaded, then apply the update. You shouldn’t get any kind of troubles at this stage, however, in case you get ‘modified error’, you could try to perform a factory reset, and repeat the steps from the beginning, but don’t forget to make a backup before doing so.
- After the software upgrade running successfully, you can restore root on Sprint Galaxy Mega with L600VPUANA7 firmware by re-run OTA Rootkeeper app.