Apply suggestions from code review

Co-authored-by: Divya S Pillai <91891495+divipillai@users.noreply.github.com>

Author: MarkusLassila

doc/app/sm_configuration.rst

@@ -275,7 +275,7 @@ The following configuration files are provided:
   For other setups, you can customize the overlay to fit your configuration.
 
 * :file:`overlay-nrf91m1.overlay` - Devicetree overlay for use with the nRF91M1 SiP.
-  Configures ``uart0`` and ``uart1`` with pins suitable for both 9151 DK usage and for connecting to an external MCU.
+  Configures ``uart0`` and ``uart1`` with pins suitable for nRF9151 DK usage and for connecting to an external MCU.
   See :ref:`uart_configuration_nrf91m1` for pin details.
 
 * :file:`overlay-carrier.conf` - Configuration file that adds |NCS| `LwM2M carrier`_ support.

doc/uart_configuration.rst

@@ -165,13 +165,13 @@ The following tables shows how to connect the UART pins to the corresponding pin
 
 .. _uart_configuration_nrf91m1:
 
-nRF91M1 - pre-programmed |SM| application
-=========================================
+nRF91M1 pre-programmed |SM| application
+=======================================
 
 nRF91M1 is a pre-programmed nRF9151 SiP that runs the |SM| application out of the box.
 
 The pin mapping of the nRF91M1 follows the `nrf9151dk`_ board configuration.
-nRF91M1 software can be flashed to `nrf9151dk`_ board for development and testing purposes.
+You can flash the nRF91M1 software to the `nrf9151dk`_ board for development and testing purposes.
 
 The following table shows how to connect the UART pins to the corresponding pins on the nRF91M1 SiP:
 
@@ -216,13 +216,13 @@ The following table shows how to connect the UART pins to the corresponding pins
 * Hardware flow control: Disabled
 
 .. important::
-   When working with `nrf9151dk`_ board with a PC host, the DTR pin must be wired to GND to power on the UART0.
-   Currently, this needs to be done with a physical jumper wire, but in the future, this can be done in the `Board Configurator app`_.
+   When working with the `nrf9151dk`_ board with a PC host, the **DTR** pin must be wired to **GND** to power on the UART0.
+   Currently, you must use a physical jumper wire, but in the future, the `Board Configurator app`_ can be used.
 
 By default in the `nrf9151dk`_ board, the UART0 is routed to VCOM0 on the interface chip, and UART1 is routed to VCOM1 on the interface chip.
 This allows the `nrf9151dk`_ board to be used with a PC host for development and testing.
 
-When working with `nrf9151dk`_ board with external MCU host, VCOM0 and VCOM1 must be disabled in the `Board Configurator app`_ to release the UART pins for external use.
+When working with `nrf9151dk`_ board with an external MCU host, you must enable VCOM0 and VCOM1 in the `Board Configurator app`_ to release the UART pins for external use.
 
 This setup is provided in the :file:`app/overlay-nrf91m1.overlay` devicetree overlay file.