Hi,
I upgraded my LTE module. The status display shows that the Lte interface is running. How do I get it now that WiFi or Ethernet work or are connected to the Internet
Yu have to associate this with your DHCP client and WAN interface settings.
I dont use LTE so not sure.
The rest of the device works from default settings…
Minor tweaking on wifi settings (SSID, security password etc..)
NEXT TIME CONTINUE WITH SAME ORIGINAL THREAD, I just noticed you already had one going.
For future reference. 
pOst your config
/export hide-sensitive file=anynameyouwish
How can you connect the DHCP client to the WLAN interface?
Thanks for the tip..
I will implement 
I now have orders
/ export hide-sensitive file = test
tried out. Where can I find the exported file?
Hi there there should be no spaces between file equal sign or test, thus: file=test
It will be found under FILES 
Thank you for your prompt reply. The file is in the attachment
test.rsc (3.49 KB)
(1) Why do you have two IP addresses for WLAN1 (suggesting removing the one in red)
/ip address
add address=192.168.88.1/24 comment=defconf interface=wlan1 network=
192.168.88.0
add address=10.10.10.1/24 interface=wlan1 network=10.10.10.0
(2) Why do have have LAN setup that is also your WAN setup.
IS LTE your WAN connection or your LAN subnet. something is wrong here but since I dont understand LTE . 
Can you draw a network diagram to show where internet is coming from and what your network looks like behind the mikrotik device?
Also state clearly what your expectations are for users or devices on your network.
[ so far I am guessing, is that you have an LTE capable router, that gets internet from a provider with a fixed private IP of 192.168.88.X, with gateway of 192.168.88.1]
But then you have no subnets for your own use no LAN?)
[1] Thank you, I deleted one address.
[2] I would like to access the Internet with the WAP-R using a SIM card. The router should then supply every connected device with the Internet via a LAN cable.
[3] How can I create a network diagram with Winbox? Unfortunately, I am not very familiar with Winbox.
Easiest is papier and pencil and a picture 
Hi there,
the functionality should look like this:
The configuration appears to be the default for a standard wAP with ether1 as the WAN and wlan1 as the LAN. I don’t know if a reset to factory defaults would use a different configuration with the LTE modem being present, otherwise a few changes are needed:
/interface bridge
add name=bridge
/interface bridge port
add bridge=bridge interface=ether1
add bridge=bridge interface=wlan1
…
/ip dhcp-server
add address-pool=dhcp disabled=no interface=wlan1bridge name=defconf
…
/interface detect-internet
set detect-interface-list=WANnone internet-interface-list=allnone lan-interface-list=LANnone wan-interface-list=allnone
/interface list member
add comment=defconf interface=wlan1bridge list=LAN
add comment=defconf interface=ether1lte1 list=WAN
add list=LAN
…
/ip address
add address=192.168.88.1/24 comment=defconf interface=wlan1bridge network=192.168.88.0
add address=10.10.10.1/24 interface=wlan1 network=10.10.10.0
…
/ip route
add distance=1 gateway=192.168.88.1
When adding the bridge and bridge interfaces your Winbox session may get disconnected unless using a MAC rather than IP connection.
Also IIRC if you also need a DHCP client adding to acquire an address (as using passthough on a device here) which would be
/ip dhcp-client
add default-route-distance=1 disabled=no interface=lte1
(EDIT: already someone replied before me … same lines of thinking)
The config you posted before, is that the default config of the device ?
The LTE + SIM card, is that your lte interface on your Mikrotik ?
I will also assume that you want to have AND Ethernet-clients AND wlan-clients as being part of LAN (= internal = 192.168.88.0/24 range).
Correct ?
Put eth1 on the LAN list, not WAN. Put lte-itf as WAN. Do this first and make sure to use Safe Mode when making this change since it can block your access if done wrong.
Your DHCP server is currently only serving wlan1 and I don’t see a bridge where eth1 can be part of. If you add a bridge and put eth1 and wlan1 as part of that, change dhpc-server to bridge (which you will have to do anyhow since wlan1 will become a slave if you add it to the bridge)
I don’t see a default route towards lte (and that definitely should be there): add route to 0.0.0.0/0, interface lte, distance 10 (I prefer to have the default path a bit out of the way, experts may disagree with that one)
I think that’s the major part to have it working. Others will surely chime in.
To be honest, I’m still a little overwhelmed with the steps ..
At first I tried to implement the points mentioned below. Pictures in the attachment
Unfortunately, I don’t know exactly how to implement these points: 
Your DHCP server is currently only serving wlan1 and I don’t see a bridge where eth1 can be part of. If you add a bridge and put eth1 and wlan1 as part of that, c**hange dhpc-server to bridge** (which you will have to do anyhow since wlan1 will become a slave if you add it to the bridge)
I don’t see a default route towards lte (and that definitely should be there): add route to 0.0.0.0/0, interface lte, distance 10[/flash][/flash] (I prefer to have the default path a bit out of the way, experts may disagree with that one)
Post your lastest config !!
/export hide-sensitive file=anynameyouwish
As Anav said (without the exclamation marks )
On your lasts screenshots, the one for DHCP server: remove the line in red with defconf. It is invalid now because wlan1 is part of the bridge.
You can not run a DHCP server on a slave interface.
And then provide your export again please.
Thanks for the help
Attached the file
Unfortunately, I currently have the problem that the device sometimes does not want to connect to the PC
anynameyouwish.rsc (3.56 KB)
I didnt mean literally the file should be called anynameyouwish, I meant that you could use any name you desired for the file LOL
(1) Lets tidy this up…/interface list member
add comment=defconf interface=wlan1 list=LAN
add list=LAN
add interface=ether1 list=LAN
add interface=lte1 list=WAN..
TO
/interface list member
add comment=defconf interface=wlan1 list=LAN
add interface=ether1 list=LAN
add interface=lte1 list=WAN
add interface=eplus list=WAN {just to be sure we are capturing all possibilities as not familiar with LTE}
(2) From
/ip address
add address=192.168.88.1/24 comment=defconf interface=wlan1 network=
192.168.88.0
TO
/ip address
add address=192.168.88.1/24 comment=defconf interface=bridge network=
192.168.88.0
(3) Did you enter this IP route and if so why?? Typically we dont route to the gateway of the LAN but to the gateway of the WAN??
/ip route
add distance=1 gateway=192.168.88.1
Typically under either DHCP client or I suspect in your Case LTE client settings there is a selection for ADD DEFAULT ROUTE YES NO.
[1] Unfortunately I had problems with this point .. Picture in the attachment
The rest has worked so far. This time I even changed the name of the file: D
Do I have to add anything under the DHCP client?
test.rsc (3.68 KB)
I am not sure you need to frig with DHCP client, if you already have LTE client settings as a separate entity.
if you do need dhcp client then the interface would be the LTE one NOT the wifi one.