@bazevren0802 

Hello,

Did you want to change the external antennas? If so, please look at the following information:

First of all, the two external antennas are 4G LTE antennas, which are different from ordinary wireless device’s antennas. This antenna is mainly used to receive 4G signals from ISP by auxiliary SIM card. In principle, it’s not recommended to replace them, because the antenna is only used as an auxiliary, and the strength of 4G signals mainly depends on SIM card and ISP.

Secondly, if the user thinks that the 4G antenna of the prototype is not good enough to receive signals and insists on changing the antenna, please tell the user the following information:

1). If you want to change, you must change two antennas at the same time, and the two replacement antennas should have the same specifications because the two antennas work together. If you only change one of them, it will not achieve the desired effect, but the effect may be worse.

2). For the replaced antenna, the interface type needs to be matched. The interface type of the two external antennas is SMA plug, that is SMA male, not ordinary RP-SMA.

3). The frequency range supported by the replacement antennas should be the same as the original antennas. See the table above for the specific supported frequency range.

4). The distance between the two replacement antennas shall not be less than the distance between the original antennas.

May it help and have a nice day!