Hello there,
I need a solution like failover 2 Wan
1: DSL
2: LTE sim card connection


when DSL is down automatic shift on LTE SIM card connection
please help to find the product or something

When you have to ask questions like this, it could be too difficult for you to get the whole thing going. Failover configuration on MikroTik isn't a matter of setting some checkmark and be done with it.
Also the question lacks a lot of information. E.g. the expected speed of the device (DSL connection parameters), the type of environment (professional or consumer), the type of connectivity you want (ethernet, wifi), the budget, etc.

Basically, all MikroTik devices have the same features, so you would only need to select a product that offers LTE and fulfills the other requirements, because failover is possible with all of them.
Difference is in performance (max speed), packaging, power redundancy, etc.
But that does not mean you can unpack it and use it after filling some basic info fields, as with some other routers on the market. You have to have networking understanding and be able to do network configuration and debugging, and I expect that you do not. (or you would not be asking this question)

any Mikrotik product with 3 ethernet port can do that with routerOS.
To advice the right product will depend on:

• throughput you need

• do you have already ext. LTE router, or do you want LTE modem in Mikrotik

• If you have ext. LTE router, do you want it to be PoE powered from Mikrotik?

• How many ethernet ports you want (or even SFP ports)

• How much are you willing to spent

Example what you can do:

• You could use RB4011 (high end) which has an PoE out port, to which you connect an LTAP LTE (or somthing similar)

• When DSL fails, it powers up LTE modem and connects to it

• When DSL is back online it shuts down the LTE modem and powers off ...

Or:

• Audience, this device has integarted LTE modem (in the LTE version)

• You would not need to add any external LTE product

• Only limitation is , with DSL modem port connected to Audience you have only one Ethernet port remaining

Or (in this example you would not have any ethernet port for LAN):

• Ltap LTE kit

• Connect DSL modem to the one Ethernet port of LTAP LTE

• You will have a Wifi only router with LTE/DSL failover (but no LAN ethernet port)

This is somewhat what you asked for: viewtopic.php?f=2&t=156348

The choice of the best Mikrotik device(s) to do this depends on all those requirements.
It can go from an AP with a (USB dongle) LTE modem, over devices like ltAP and wAP-R , or a setup with router and SXT LTE .... and many more combinations.

any Mikrotik product with 3 ethernet port can do that with routerOS.
To advice the right product will depend on:

• throughput you need

• do you have already ext. LTE router, or do you want LTE modem in Mikrotik

• If you have ext. LTE router, do you want it to be PoE powered from Mikrotik?

• How many ethernet ports you want (or even SFP ports)

• How much are you willing to spent

Example what you can do:

• You could use RB4011 (high end) which has an PoE out port, to which you connect an LTAP LTE (or somthing similar)

• When DSL fails, it powers up LTE modem and connects to it

• When DSL is back online it shuts down the LTE modem and powers off ...

Or:

• Audience, this device has integarted LTE modem (in the LTE version)

• You would not need to add any external LTE product

• Only limitation is , with DSL modem port connected to Audience you have only one Ethernet port remaining

Or (in this example you would not have any ethernet port for LAN):

• Ltap LTE kit

• Connect DSL modem to the one Ethernet port of LTAP LTE

• You will have a Wifi only router with LTE/DSL failover (but no LAN ethernet port)

thanks, sir, what a wonderful language for beginners thanks a lot Sir ill really appreciate you