Currently, there is no 5G modem/dongle available in India. Given this, you can opt for either of the two solutions outlined below:-----
In the quest for a workable solution, the most prudent course of action involves the acquisition of a mobile device equipped with a robust Snapdragon or MediaTek modem. It's pivotal that this modem supports 5G carrier aggregation while excelling in signal reception.
Following this, consider investing in an ASUS router known for its USB tethering capabilities. Although it's crucial to note that a majority of ASUS router models support this feature, there are certain exceptions. At this point in time, you can conveniently find an ASUS WiFi 6 router on Amazon for a reasonable price of 6,000 rupees.
The advantages of this configuration are multifaceted. Firstly,It eases the burden on your mobile device by eliminating the need to create a WiFi hotspot.This results in lower operating temperatures for your device and an extended battery life,uninterrupted usage. Furthermore, since tethering also involves power transfer, it may charge your mobile device gradually, ensuring it doesn't deplete rapidly.
In addition, it's worth mentioning the availability of 5G dongles in the Indian market. However, it's important to understand that these dongles do not come equipped with an integrated 5G module. A reputable manufacturer in this niche is Waveshare, and you can find their product
here. It's important to note that the 5G module must be procured separately. Currently, the Snapdragon X55 modem is the primary choice available for this purpose, but it may have certain feature limitations to consider.
In the current technology landscape, these are the predominant solutions available to you.
Thank You.