Download latest Android Jelly Bean 4.2.1 stock firmware for iOcean X7 Elite smartphone from here or from here. Download previous version from here. Download another iOcean firmware from here.
Archive: iOCEAN X7 421 fw
Archive file size: 416 MB
Platform: Mediatek MT6589
Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.