SIM868 Power supply

Hi,
I’m currently designing a circuit board with the SIM868 module, from the RF design application reference they recommend to use an ferrite bead FB101 to filtering the noise from DC-DC.
Is this a best practice to do ? because i see in all other applications they don’t use that.

RF design application reference : https://simcom.ee/documents/SIM868/SIM868_RF_Design_Application%20Note_V1.00.pdf

Its good practice if you want to comply to EMI EMC standards. Or it will still work.