I'm fairly sure international calling works basically like I outlined in my last post and in the link I provided earlier. Some Google searches or asking in the right place will no doubt get you some definitive answers
Anyway, yes, get a Google Voice number. It's just like getting a second line on the phone. The original cell number works same as always. Just go into GV settings online and set GV to forward all calls to the cellphone number. Then no matter which number is called the phone rings normally.
My wife and I have used our GV numbers for business numbers and almost everything else for years and literally thousands of calls with no problems. Only friends and family know our real cellphone numbers.
Since you have prepaid service, you also have conditional call forwarding, which makes it possible for GV to handle all voicemail.
Install the GV app and you have visual voicemail for both numbers in one place. During setup choose GV for all voicemail service, not your service provider's voicemail. This activates conditional call forwarding.
Remember, in initial setup outlined earlier, GV was setup to foward all calls to the GV number to the cell number. This is standard setup.
Well, now unanswered calls to the cell number are forwarded by conditional call forwarding back to GV so GV can handle all voicemail, for either number, in one place and as visual voicemail.
To really make GV work seamlessly, especially if you've organized your contacts into groups, install VoiceChoice 2.0.
It works like this: Setup VoiceChoice to, for example, call all Business Group contacts using the GV number and call all Friends & Family Group contacts with the real cell number. Set the GV ap to make all calls through GV by default. But VoiceChoice 2.0 actually dials out. It automatically chooses to use either the cell number or GV number, depending on the contact group the contact being called is in. So, Business contacts see the GV (aka business) number, and Friends & Family contacts see the cell number.
This works perfectly. Routing is automatic. You don't have to do anything special or remember anything, just use the phone normally and GV and VoiceChoice 2.0 automatically deals with which phone number is used for outgoing calls.
With VoiceChoice you can also choose which number is used by individual contacts instead of by group. And GV wil do specialized voicemail messages by contact group and much more.
Let me know if I can help with anything.
https://forums.androidcentral.com/e...oogle.android.apps.googlevoice&token=19GVJvf5
https://forums.androidcentral.com/e.../apps/details?id=com.voiceplus&token=L4rhPO_j
Android since v1.0. Linux since 2001.