I am using a MiFi device in my home but struggling with poor speed and Wi-Fi coverage. Can you suggest a better solution?

A slow connection directly influences your online experience. Generally the outdoor signal is about -20db stronger than the signal indoors. Indoor performance is therefore greatly compromised. By mounting a fixed external antenna and coupling it via the cable to the 3G/4G device, performance will be greatly improved. This is done by attaching the antenna cable to the router via a fly lead (30cm cable and device specific connector) or generic adapter pad.