I have a phone made by VSN Mobil called the V.50. It's running their own mod of 4.4.2. The normal method of tapping Build Number seven times to access Developer Mode does not work. I just need to be able to install and debug.
Has anyone successfully gotten a V.50 into Developer Mode?
[UPDATE]
After some back and forth with VSN's customer support, VSN confirmed that there is "no access" to Developer Mode on the V.50. The V.45 does display the Build Number and it can be tapped seven times to access Developer Mode, but the V.50 does not display Build Number, so therefore Developer Mode is inaccessible. Boo VSN.