Funbox2 Router and Netis E1 Booster: One Tablet Fails to Obtain IP Despite Strong Signal

Hello. I have a wifi network at home from the Funbox2 router, to increase the range I added em Netis E 1 signal booster. The network uses 1 laptop, 2 PCs, 2 tablets, 2 smartphones, and an rs wifi converter. Only the latter works all the time 24 hours. Not all devices at the same time, but 2-3 so. The converter does not catch the range of the router only from this netisa. Computers from a router.portable differently either from a router or from netis, depends on which room. One tablet cannot reach the network when it is within range of the router, it has an excellent signal, but it cannot get the IP address. The other tablet has no problem with that. Both tablets from the same company. The router is assigned a fixed IP as well as other devices. The router is connected to a cable, e.g. TV, decoder. I don't know what I got wrong that I can't have internet on this tablet. There was a tablet format, router reset, and nothing else the same. I disconnected netis, the range decreased, but still this tablet does not get IP. In the tablet I do not have a file with network data to delete it and set it again, the tablet has the original android. Someone, something, will drop you when you "bite" it,

Try to connect the table to the funbox directly, with the funbox 1-2m.

A tablet about 20cm from the router did nothing. Once again I checked the funbox settings, it turned out that the tablet's IP was fixed but did not have a MAC address assigned, I did a permanent IP for the tablet again and also assigned a mac address. And ....... it started, now only when moving with him around the house for a moment his signal strength drops before he catches the signal from netis or vice versa. I do not know why he caught net from netis since the tablet's network card did not have a mac address in the router, and did not connect to the router. Whether Netis assigned his tablet rights, and for the router it did not matter if the tablet wanted to connect to the router, he no longer wanted to let the tablet. This is what it looks like to me, but I'm not very strong in the subject of WiFi networks, so I think so. It's important that it works.