Which router will cover almost 70 and How to make the Internet 2 via a router?

Now there is a router Zyxel Keenetic Omni II
(4x1000 Mbps, 802.11 2.4 GHz Wi-Fi 300 Mbps)
but it for some reason after I moved from the corridor to the room was not so good to cover the whole apartment.
and secondly, why he is sympathetic noise as if the ultrasound gives.

I have
1. Silent at all
2. To covered the entire apartment is good.
3. You can set up uninterrupted Internet want it past the main wired Internet to insert 4g modem kakoynit (also advise)
4. It is necessary that the router could switch the machine from the primary Internet on a 4g modem if the primary wired Internet is not available. (this is possible at all?) (as the Internet often disconnected is the last time and I need it to be uninterrupted)
I to myself such Looked after ASUS RT-AC58U
www.dns-shop.ru/product/128848e76fe13330/marsrutiz...
if it is suitable for all my tasks?
June 26th 19 at 14:26
2 answers
June 26th 19 at 14:28
Solution
Silent at all
They are all silent if there is no active cooling. Low frequency sound is throttle, fill them with something.

That covered the whole apartment is well
There is no such thing.

You can set up uninterrupted Internet want it past the main wired Internet to insert 4g modem kakoynit (also advise)
Kinetics, Mikrotik the majority allow it.

It is necessary that the router could switch the machine from the primary Internet on a 4g modem if the primary wired Internet is not available. (this is possible at all?) (as the Internet often disconnected is the last time and I need it to be uninterrupted)
Perhaps the only question in the algorithms of switch - in Mikrotik configured more flexibly, but also more difficult.

why after I moved from the corridor to the room was not so good to cover the whole apartment.
Don't know what it means to cover, but the quality of the connection of course will change because it changed the position of the antennas relative to obstacles and a client.
Can you recommend any good Mikrotik expensive. - douglas_Wehner commented on June 26th 19 at 14:31
:
Can you recommend any good Mikrotik expensive.

Well, if you need an expensive watch models like MikroTik Cloud Core Router only there is no WiFi.
With WiFi they are all inexpensive usually.
The quality is all the same. - earl.Weissnat commented on June 26th 19 at 14:34
: need lan 1000 Mbps support 4g modem - douglas_Wehner commented on June 26th 19 at 14:37
Well, for example -
https://market.yandex.ru/product/12430817?show-uid...
https://market.yandex.ru/product/9263634?show-uid=...

It all depends on the characteristics - such as the availability of Wi-Fi standards supported WiFi. - earl.Weissnat commented on June 26th 19 at 14:40
: only today I realized that the noise of blekitny router (not the router) when plugging the cable from his comp - douglas_Wehner commented on June 26th 19 at 14:43
: buy power supply - Gerard_Kub24 commented on June 26th 19 at 14:46
June 26th 19 at 14:30
Solution
I think you should try just the antenna the assistant to put the current router
Tick as changing only the router's coverage is not to improve

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