Sir,which IIITs can I get at 98.5 percentile(ECE Branch)?
With your percentile, your rank might be around 16k to18k. With this rank, top IIITs are difficult to get a seat into because they have quite high cut offs. You might have a shot at colleges like IIIT-Dharwad, IIIT-Kalyani, IIIT-Lucknow etc. You can refer to the below link to get more info.
https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits
Hope this helps. Good luck.