https://www.prefix.ph/
PreFIX PH - The Intelligent Phonebook App for the Philippines
The PreFIX PH app tells you what networks your contacts use. Register to load promos, pass-a-load and more all on one app!
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https://forum.pine64.org/misc.php?action=whoposted&tid=15344
phonebook app does not send sms or voice call - Who Posted?
phonebook appdoes notsend smsvoice callposted