Help for setting power saving mode in LPWAN (LTE-M and NB-IoT)

There is step by step guide available for how to enable the Power Saving Mode (PSM) in LTE-M and NB-IoT in the blog section:
How to Enable Power Saving Modes of NB-IoT and Cat-M

In addition to that I would like to share a small web tool to help you in T3412, T3324 - PSM - at+cpsms command generation and especially decoding.

As you might have recognized the mobile network is the master - has the last word regarding your PSM timer settings for your application. The device sends a PSM setting request via at+cpsms (in attach request and/or TAU) and the network will reply in the related accept message (reflected in at+cereg=4/at+cereg? output or URC) with the ‘granted’ value.
One reason for this is to prevent overload situations in the network if e.g. 10000 smart meters wake up from PSM at the same time in the same cell.

The correct coding and setting of the timer can be confusing. This is why this small psm-calculation-tool was created.

Using the sliders on this page you can change your desired T3412 and T3324 values and copy the at+cpsms from the shown table.
In the upper section you can enter the at+cpsms? command output as well as the at+cereg? output (after setting at+cereg=4) to get the values decoded. These are the value the network will finally use and your NB-Iot or CatM module has to use.

How to get access to a cat-m and/or nb-Iot network?
You might try this IoT SIM card with global connectivity.