About the improvement of the lte and wifi signal at RUT 901

Hello…how can you improve the lte 4g and wifi signal?..I used sma and rp sma cable as an extension to the router’s antennas to improve the signal…with wifi it doesn’t seem to change anything, with lte it seems to. …SIM 1 has the auxiliary connectors next to it? separate from SIM 2?..I only use SIM 1… can anyone recommend a wifi or dual function antenna for the cellular network that does not require power supply?..thanks in advance.

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