Hi! I can help you with your decision.
All three phones you mentioned are great options, but they have some differences worth considering.
First, let's talk about the display. The Xiaomi 12T and Poco F5 both have AMOLED screens, while the Redmi Note 12 Pro+ has an IPS LCD screen. AMOLED screens are generally known for having better contrast and deeper blacks compared to IPS LCD screens. If you prioritize having an AMOLED screen, then the Xiaomi 12T or Poco F5 might be a better choice.
Now, let's talk about the processor. The Poco F5 has a more powerful processor compared to the Xiaomi 12T and Redmi Note 12 Pro+. The Poco F5 has a Snapdragon 870 processor, while the Xiaomi 12T has a Snapdragon 870 and the Redmi Note 12 Pro+ has a MediaTek Dimensity 920 processor. If you prioritize having a more powerful processor, then the Poco F5 might be your best option.
Other things to consider are the camera and battery life. The Xiaomi 12T has a 108MP main camera, while the Poco F5 has a 50MP main camera. Both phones have good battery life, with the Xiaomi 12T having a larger battery capacity.
Ultimately, it comes down to your personal preference and priorities. If you value having an AMOLED screen, then the Xiaomi 12T or Poco F5 might be a better choice. If you prioritize having a more powerful processor, then the Poco F5 might be your best option. Consider these factors and make your decision based on your needs.