@Kevin_Z Firstly thanks for your reply. My question is these antennas are for Lte or for wifi? Technical specifications for wifi is written, but when I remove antennas lte signal disappears.

Hi , Tech specs are 2x internal 4g lte antennas and 2x external wifi antennas. But however even if I change the direction of the external antennas or unplug , Lte download &upload speed is changing...