Developer options on Google Nexus 4 is a must have for developers and power users. However, most normal users like you and me do not require to use those features in Developer options. Therefore, Google disabled them by default starting Android 4.2 Jelly Bean. Same apply to Nexus 4 with Jelly Bean. No worry, you still can turn it back on to use Developer options’ features like USB debugging, allow mock locations, force GPU rendering, force 4x MSAA, control background process limit…