As of my knowledge cutoff in September 2021, here are the top five smartphones under ₹30,000 budget. Please note that smartphone prices and models may change over time, so I recommend checking the latest options and prices from reputable sources before making a purchase:

1. OnePlus 9R: The OnePlus 9R offers a great balance between performance and price. It features a powerful Snapdragon 870 processor, a high-refresh-rate AMOLED display, a versatile camera system, and a clean software experience.
2. Samsung Galaxy F62: The Galaxy F62 packs impressive specifications for its price. It comes with Samsung’s Exynos 9825 chipset, a large Super AMOLED display, a massive battery, and a capable camera setup.
3. Xiaomi Mi 11X Pro: The Mi 11X Pro offers flagship-level performance with its Snapdragon 888 processor. It boasts a high-refresh-rate AMOLED display, a versatile camera setup, and a feature-rich MIUI software experience.
4. Realme X7 Max: The Realme X7 Max is a value-packed smartphone that comes with a MediaTek Dimensity 1200 chipset, a Super AMOLED display with a high refresh rate, a capable camera setup, and fast charging support.
5. Vivo V21: The Vivo V21 focuses on camera performance and design. It features a 44MP front camera with OIS for excellent selfies, a capable rear camera system, a slim and lightweight design, and a vibrant AMOLED display.

Remember to consider your specific requirements, such as camera quality, display preferences, software features, and battery life, while choosing a smartphone. Additionally, it’s always recommended to research and compare the latest models available in your region before making a final decision.