Suggest me a mobile for gaming purpose under the price segment of rs. 15k

No good option, go beyond 20.

Realme gt 6T

Or, Infinix gt 20 Pro
Moto edge 50 fusion

Gaming on phones without proper cooling may lead to damage

IQOO Z9 5g- https://www.desidime.com/deals/iqoo-z9-5g-brush...

Gaming segment lies aroung 25k, but I will provide three best performance centreic smartphones below.

1. Vivo T3x (Flipkart) / Iqoo Z9x (Amazon): Snapdragon 6 gen 1 processor (best in this price range), camera okayish, LCD display, stereo speaker. Buy atleast 6GB variant. Vivo T3x is cheaper right now with Flipkart-axis card.

https://www.flipkart.com/vivo-t3x-5g-crimson-bl...

https://www.amazon.in/iQOO-Tornado-Storage-Snap...

2. Moto G64: Good and they are advertising as a 'smooth gaming experience'. This phone is a better rebranded model of G54. MediaTek 7025 (decent performace), IPS display with stereo speaker. Camera is good.

https://www.flipkart.com/motorola-g64-5g-mint-g...

3. Realme P1 :Flipkart) / Realme Narzo 70 (Amazon): Much hyped smartphone, comes with Amoled display. Dual speaker, decent camera, MediaTek Dimensity 7050 (arguably better than Snapdragon 6 gen 1). Narzo 70 has glass back panel whereas P1 has poly-carbonate. P1 is slightly cheaper right now with Flipkart-axis card.

https://www.flipkart.com/realme-p1-5g-phoenix-r...

https://www.amazon.in/realme-Storage-Dimensity-...