There are several good smartphones available in the market under 10K (10,000 INR). Here are some options that you may consider:
Realme C21: Realme C21 comes with a 6.5-inch HD+ display, MediaTek Helio G35 processor, 3GB RAM, and 32GB storage. It has a triple rear camera setup with a 13MP primary camera, 5MP ultra-wide camera, and 2MP macro camera. The front camera is a 5MP shooter. It is powered by a 5000mAh battery and runs on Android 10 with Realme UI. The price of Realme C21 is around 8,999 INR.
Redmi 9: Redmi 9 features a 6.53-inch Full HD+ display, MediaTek Helio G35 processor, 4GB RAM, and 64GB storage. It has a dual rear camera setup with a 13MP primary camera and a 2MP depth sensor. The front camera is a 5MP shooter. It is powered by a 5000mAh battery and runs on MIUI 12 based on Android 10. The price of the Redmi 9 is around 8,999 INR.
Samsung Galaxy M02s: Samsung Galaxy M02s comes with a 6.5-inch HD+ display, Qualcomm Snapdragon 450 processor, 3GB RAM, and 32GB storage. It has a triple rear camera setup with a 13MP primary camera, 2MP depth sensor, and 2MP macro camera. The front camera is a 5MP shooter. It is powered by a 5000mAh battery and runs on Android 10 with One UI 2.5. The price of the Samsung Galaxy M02s is around 9,999 INR.
Poco C3: Poco C3 features a 6.53-inch HD+ display, MediaTek Helio G35 processor, 3GB RAM, and 32GB storage. It has a triple rear camera setup with a 13MP primary camera, 2MP depth sensor, and 2MP macro camera. The front camera is a 5MP shooter. It is powered by a 5000mAh battery and runs on MIUI 12 based on Android 10. The price of Poco C3 is around 7,499 INR.
These are some of the best options available in the market under 10K. You can choose the one that fits your requirements and budget the best.