If you have time to spare this is a nice option to have. However,I didn't so after looking up reviews online I got a TPLink Archer MR200 LTE/4G router that you

If you have time to spare this is a nice option to have. However,I didn't so after looking up reviews online I got a TPLink Archer MR200 LTE/4G router that you can simply plug a sim card in and it provides both wired and 2.4/5GHz WiFi. As the thing sits in the attic next to a diy dual biquad lte antenna its Wifi doesn't cover lower floors of the house so I have two of Fritz Wlan Repeater 1750E. Now the TPLink router is not cheap. The US price is around $300, but in my opinion is well worth it as it gives me the ability to connect my DIY antennas and up to now it has been working almost flawlessly (barring a restart every few months) for 3 years. There are probably other routers that are equally good, but my experience is with this one. Regarding the WLAN repeater, it is also an expensive one at around $100, but it is the only reliable WLAN repeater I found. I started with a cheap D-Link, returned it to the store after a day, tried another one etc. I went through 5 or 6 repeaters until I found this model that actually works with multiple devices, is fast etc. Also, on the subject of LTE, I had real trouble finding a directional antenna I could purchase that would have at least 10dB gain at 800MHz (that's the LTE frequency my local tower uses) and wouldn't cost more than the router itself. So I ended up making two of them(as the router supports multi paths). At the end of the day it is only a bit of sheet steel and wire. I don't get why good lte antennas costs as much as they do.