If you are happy with the way your mobile phone/modem is working then this thread is not for you.
However if you are looking for a way to obtain decent resolution of the Received Signal Strength Indicator and set up various other involved aspects of your mobile connection then you may well be interested in this software:
https://mybroadband.co.za/vb/showthread.php/59080
I shall be making a 850MHz yagi soon as I discovered that connecting a 2m J Pole into the Telstra/Huawei E353T modem provided around 7db of gain which, in a bush mobile situation, is well worth having so a resonant beam antenna should do better.
MH
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"I beseech you in the bowels of Christ think it possible you may be mistaken"
Oliver Cromwell, 3rd August 1650 - in a letter to the General Assembly of the Kirk of Scotland