The RSSI is in true dBm, which means that the lower the better. To achieve successful data comms, signal strength should be better than receiver sensitivity (which may be different on various devices), so I would say (to be on the safe side) that better than -85dBm would be sufficient to do this. Received Signal Strength Indication (RSSI) without the antenna was 80 and after antenna installation it is a sweet 53 in a fair coverage zone. The lower your RSSI the better your signal strength. To check this type *#2368*#07# on your Neotel phone, page down to RSSI and press select to see the RSSI value and then press back. It is important to determine where your signal is coming from by checking Neotels coverage https://salesportal.neotel.co.za/web/guest/home in most cases it will be the base station closest to you but does not have to be the case. Zoom out till you see 3 dark orange sections closest to your current location, it looks like a 3 leave clover, this is the base station. Try and position your antenna to face in that direction of the base station first by moving it 10 degrees as a time, move away from the antenna so to not interfere with the signal, wait a 1 minute (no less), then check your RSSI on the Neotel phone as mentioned above, repeat this process till you find the sweet spot with the lowest RSSI. Record the RSSI value and the direction of the antenna on a piece of paper to make it easier to place the antenna in this position if it is the lowest RSSI. Once you tested the entire angles, place the antenna in the position that gave you the lowest RSSI. Do one final RSSI test on the phone to ensure you are still getting the lowest RSSI value as you might have moved the antenna while tightening the bolts. It will be beneficial to place the antenna where you have a full 360 degree range to determine the best possible angle and RSSI value. After a few hours of testing your new RSSI, you can fine tune the antenna even further by turning the antenna 1 or 2 degrees at a time and by facing the antenna slightly vertically or horizontally to find an even better RSSI value. This process does take sometime but is very well worth the effort. This antenna is excellent for Neotel phones as you can see from my results and the fact that I am in a Neotel fair coverage zone.

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