EG912UGLAA-I05-SGNSA module LTE and GNSS antennas

We would like to use the EG912UGLAA-I05-SGNSA module for our trackers. We are requesting support with LTE and GNSS antenna design, can only internal antennas be used for normal connection or is it necessary to use external ones as well? Is this enough to use a 27x45mm double sided PCB for LTE and GNSS antennas ?

Hi @Einar_Velpler