Add-on Numbers

Add-on Numbers is a Chrome extension that lets you manage multiple phone numbers in one app. Each number has its own interface with dial, phonebook, messages, voicemail, and a separate WhatsApp account, and you can hold up to four numbers per main SmarTone account, including the Easy Number Mainland Mobile Number option.

Pricing and availability: Daily Plan is HK$5 per day per number (capped at HK$35 every 30 days). Monthly Plan is HK$30 per month per number (12-month contract). The Easy Number Mainland Mobile Number is HK$18 per month for SmarTone monthly customers. Usage such as voice, data, messaging, and roaming is charged to the main plan; terms apply. For details, visit smartone.com.