You shouldn’t hook a repeating amplifier directly to a cellular modem. The gain coming off of these amplifiers is well over what an embedded modem can tolerate and you are likely to burn the modem out in a worst case, but definitely provide so much noise the modem wouldn’t connect. You’ll want to keep that wireless or use a direct connect amplifier. The manufacturer may be out of stock but we do have the Signal 4G in stock at 3Gstore.com