This works to get the best signal if you use your common sense and place it in the best spot to get reception outdoors. It will take some trial and error to find. There are 2 antennas that you need to tune to achieve this. It is designed to work with all mobile phone connections. Chinese printing, guidance and marketing leave a lot to be desired, hence the negative reviews. Fast delivery, now I want to order 2 to save shipping cost as I have 2 places in my van where I use the phone and range is limited so I don't want to mess around with placement every time. I wrote this review on my phone in my van where it wasn't possible before! is only intended to support your reception from an already transmitted tower.
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