@Gazmondo 

Hello,

Thank you very much for your patience.

For the MR6400, V5/V4 for example, it has 2 × Detachable External 4G LTE Antennas.

So it would be exchanged for more powerful LTE antennas;

While, since we did not run the related test about different LET antennas with MR6400, so it is hard to guarantee that the signal strength would 100% get much higher.

And it is also suggested that you change either nothing or everything

Thank you~