[Q] Wrong rom on d2305 topic

Hi everyone, I've got a Sony d2305. I've got also a problem: I flashed the incorrect rom on this device and, after the boot, I began seeing a black and yellow screen with a red warning saying "Mismatch!!" and below: Model [eagle_lte] and Software[eagle_ss]. I'm keeping seeing even now that I flashed the correct rom over it. The weird thing is that sometimes if I turn my phone in landscape mode when this warning is showing you can see the normal working Android below it! So I'm here to ask if there's a way (Cwm, flashtool or other tools) to completely delete all the stuff I've in my phone and then put again my CWM and from there install zips of roms. Thank you for answering :D
-a desperate noob :crying: