Originally Posted by pochoreyes
ready and did not work, but I just put the kdz E97510D_00, international European version, and recognizes the IMEI, IMEI SV, but I still have phone service, data service ... when I bought the phone indicated that it was f180s version telecom, turning on the phone appears telecom T, please need your help if someone gives me a clue
I have experienced the same problem on more than one occassion.
What you need to do now is flash back to your stock F180S Firmware KDZ. Once finished, hard reset by pressing "Volume Up + Power". Boot your device without SIM card and you will see that your IMEI is back. But the bad news is that when you will insert the SIM card, your IMEI will disappear again. And not to mention that there won't be any network coverage for now. Don't worry.
This is the hard part of your solution. You need to take your phone to an unlocking professional and get your phone unlocked. I myself own Octopus Box so it wasn't a problem for me. But if you don't have one, you will need to pay him a few bucks for doing it. Once unlocked, your network will be back and your IMEI won't disappear when you insert the SIM card.
Next, you need to root your phone and backup your baseband from this working phone. I will upload my tested baseband backup tool and will provide you the link.
Rest is easy, you need to flash the E975 Hong Kong KDZ, root it, re-flash your backed up baseband and you'll have E975 original firmware with everything working as it should.
Feel free to PM me or post here if you have any problem.