When a browser-based virtual number works well
A virtual number managed in the browser fits when you need a local presence for SMS and optional inbound calls without a second handset. BLAH! phone lets you send and receive SMS in the dashboard and forward inbound texts with SMS-to-email on supported numbers.
When you still want a physical SIM or eSIM
Keep a physical SIM if you need cellular data, offline carrier voice, or services that block VoIP and virtual numbers. Some banks and government portals reject virtual numbers for verification.
Cost and flexibility
Virtual numbers are billed as a number subscription plus pay-as-you-go for outbound calls and SMS. There is no hardware to buy, and you can cancel when you no longer need the number. BLAH! phone shows the live call rate in the dialer before you connect, and calling credits never expire.
Getting started with BLAH! phone
Choose a supported number (US and UK are common for SMS), confirm inbound SMS support, enable SMS-to-email if you want inbox alerts, and use the browser dialer for outbound calls. New users get a free first minute on calling.