MB SMS, the Android application that sends SMS, WhatsApp, and Telegram messages from your phone to MB STUDIO, must be installed on an Android phone that must be constantly powered and connected to Wi-Fi.
For this reason:
DO NOT USE YOUR PERSONAL PHONE
MB SMS must run on a phone that is preferably free of other applications; only WhatsApp and Telegram should be installed. Any other applications should be removed if possible to avoid interference and malfunctions.
MB SMS has only been tested with Android versions 10 to 15 and only with Samsung and Motorola brands. (We don't know if and how it works with other brands)
You can therefore use your used phone (reset it to factory settings to erase all personal data)
If you prefer to buy a new phone to use with MB SMS, you don't need a powerful phone or a lot of RAM.
I tested it with a Motorola G54, which you can purchase here:
https://www.amazon.com/Motorola-Dual-SIM-Factory-Unlocked-Smartphone/dp/B0CF2PH6Z5/ref=sr_1_1
Any Motorola model should work fine, as the Android version provided Motorola is very similar to the original Google version (Stock Android).
I've also successfully tested some Samsung models.