Vi giving good speed on phone but poor speeds in LTE modem

[pillaicha]

You'll get better speeds in the 50 Mbps+ range. Could improve in future to 100Mbps+.

 

[pillaicha]

Would this be a good option with MR600?

https://www.amazon.in/gp/product/B09JZLM473

This is a highly directional LPDA antenna. Not recommended unless you're living literally at the fringe zone of cellular coverage. It needs expertise to orient/align properly and will cause issues in windy conditions if it shakes too much.

Choose an omnidirectional antenna (looks like a short stick/ thin cylinder). It has lower gain (1-3 dB), but better overall performance. Some expensive models even do MIMO with a single cylinder, but it's not recommended cost-benefit wise. If you want true MIMO, buy two separate antennae, keep them as far away from each other as possible on the roof, and connect them to the two different ports in the modem.

Also choose a coaxial cable that's thick (50 ohm impedance) double shielded ones. Like LMR-600 or higher. It gives the best results. Speeds can hit around 100Mbps without CA. Not a lot of modems support CA, but they do support MIMO, so take advantage of that.

 

[MeanMachine]

SINR values inside the house hover around -5 to 0 dB at best. Would this be considered a fringe zone of cellular coverage?

 

[pillaicha]

Yes