DIR-825 Quick Installation Guide
In order to connect your device to the network of a 3G or LTE operator, on the 
Device   mode  page,   from   the  Connection   method  list,   select   the 
Autonomous  value.  Then from the  Work  mode  list,  select  the  Mobile 
Internet value. In this mode you can configure a 3G/LTE WAN connection, 
set your own settings for the wireless network in the 2.4GHz and 5GHz bands, 
and set your own password for access to the web-based interface of the device.
In order to connect your device to a wireless ISP (WISP), on the  Device 
mode  page, from the  Connection method  list, select the  Autonomous 
value. Then from the Work mode list, select the WISP Repeater value. In 
this mode you can connect your device to another access point, configure a 
WAN   connection,   set   your   own   settings   for   the   wireless   network   in   the 
2.4GHz and 5GHz bands, and set your own password for access to the web-
based interface of the device.
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