Xiaomi is offering a free upgrade to a Xiaomi 12 Pro for Mi 11 Ultra users who are facing Wi-Fi issues. These users also have the option to further upgrade to the company's latest Xiaomi 13 Pro by paying an increment fee of Rs. 30,000.

source https://www.gadgets360.com/mobiles/news/xioami-12-pro-11-ultra-exchange-13-rs-30000-incremental-cost-wifi-issues-specifications-4110490#rss-gadgets-all