How can I install Hyperos on My 13 ultra chinese model with Global ROM

[thchr]

Hi, I have currenty a xiaomi13 ultra (Model 2304FPN6DG) bought on rakuten site (chinese model with global rom installed) with miui Global 14.0.5 (TMAMIXM).
I cannot get any update since Octobre 2023 and would like to have Hyperos instead (with global ROM I asume).
Can someone add the step by step procedure to help me upgrade to HyperOS?
thanks

 

[NOSS8]

If it is still possible, return it and ask for a refund, which will probably be difficult with a third-party seller.

 

[thchr]

If it is still possible, return it and ask for a refund, which will probably be difficult with a third-party seller.

it's too late unfortunately, the acquisition was a while ago and the seller is not responding