Download Android ICS 4.0.3 Stock Firmware for HTC Sensation G14 / G18 smartphones from here or here. Download another HTC firmware from here.
Archive name: HTC_G14_G18 4.0.3 FW
Archive file size: 664 MB
Image: HTC_G14_G18_SJDS_20150403.zip & HTC_G14_G18_SJJL_20150403.zip
Model: HTC Sensation G14 / G18 smartphones
Build number: HTC_G14_G18_15.04.03_v4.1 CL391535 release-keys
Caution: 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.