My K800i died on me 2 years ago. I managed to flash it to work again using settools2lite
My brother had installed Sony Ericsson Suite and it upgraded my phone to a CID53 and my phone died on me again, I tried all sorts of guides and toturials to reflash the CID53 verisons but it was more complicated than i thought.

I dont remember what i did or what i did wrong. Im not even really sure my MS and FS packages are right. i didnt know shit about what i was doin at the time and im still a rookie but i now have more information about flashing and modding then i used to have then.

Anyhow, i want my phone to start working again.

I left it in a condition when i gave up. I had just reflashed it with what i think was CID53 MS for k800i and language package EUROPE 4. when i start my mobilephone it says inserst SIM card.
And when i insert my SIM card the phone says fuck you "Konfigurationsfel Kontakta nätoperatören eller servicecentrat" in englisht that would be "Configurationerror contact networkoperator or servicecenter"

I saw another post here about custom.rar file should be extracted in the phone, since my phone is fucked up. i can only insert the phone to the pc and read the content. and there is no custom folder inside so i created one and inserted it there. but as i expected i dint work.

I've also tried using far manager and such but it says "cid error, cid not recognized"

If you were to help me and my phone would start working again i would be more than appricated for your time and knowledge about these things:

Information might be needed is : i live in sweden and currently am using Tele2 Comviq