I have a TalkTalk router, and an HTC phone which gets 54 Mbps wi-fi when near it. However, my new Samsung Tab 4 has 'signal strength - weak' and only 1 Mbps wi-fi when near the router. Is there some way of improving this? The 'Manual' on screen of the Tab 4 does not seem to have any info. on this. Any help much appreciated, thank-you.