Sms4sats is very easy to use. Pick your country and service, pay the invoice with lightning (Layer 2 solution on bitcoin. Build for fast and cheap transactions) , and reveal the number.
Also you can use it on telegram or discord. If the sms fails your payment will be canceled automatically .
Website - https://sms4sats.com
Twitter -https://twitter.com/sms4sats
There are many good lightning apps out there. My favorites are zebedee and getAlby(browser extention), very easy to install and use.
