Your montera ,, is a copycat of an Android ... put out by garmin ,,posthaste less than a year ago. If former garmin quality and after service is any indication ,, good luck.
With any smart phone ,, in fact any phone ,, one can hear the music or phone ,, using ear phone or blue tooth ,, sorry I like my music blaring streophonic ,, while I ride.
All Android navigation ,, while playng music ,, when the turn by turn instruction comes on , music goes down,, then comes right back to music volume.

Yes montera ,,playing catch up has put in a wifi ,, yet it still is not a telephone,, nor a computer , nor a good camera ,,can not use skype,,kakao ,, can not surf internet,, can not attach a sat phone. This review asks ,, why ,, what is it garmin,, this monterra at 750 bucks + 30 for this ,, 100 for that ,,? (garmin really knows how to sell you ancilliary things to you)
http://www.globeriders.com/article_p...monterra.shtml

99% of the garmins ,, still has to be plugged into a pc ,, to download maps ,, and at a great hassle! If you don't pay for their blood curling high priced maps , one has to learn a whole life time to download OSM and also learn how to use it.

You can buy smart phones, in 90% of the world.
https://www.google.co.kr/webhp?sourc...es+in+mongolia

https://www.google.co.kr/webhp?sourc...phones+in+Iran

https://www.google.co.kr/webhp?sourc...ones+in+Soweto

https://www.google.co.kr/webhp?sourc...n+Sierra+Leon+

https://www.google.co.kr/webhp?sourc...phones+in+Peru

Try buying a garmin ,, on the market place in Wakhan Valley or Kashigar,,, smart phone is possible. They even use solar panels to charge the suckers.
One can even buy one in Medina Souk or at the open market in Marekesh.
Used ones are under 100 bucks ,,

Again ,, smart phones now days...
WATER PROOF ,, (see if any garmin will stay in the water for 30 minutes in one meter deep water)
DUST PROOF ,,
IMPACT PROOF ,,
Immense power of internet ,, navigation, gps tracking ,, telecommunication ,, free VIDEO calls to family using Kakao or Skype with wifi or data ,, under your finger tip.
More than a dozen choices of FREE OFF LINE maps ,, with out studying how to for ages!
20 MEGA PIXEL cameras ,,,
32 GB + 14 GB average storage ,,
BRIGHT 5 INCH SCREEN,,
DOZEN COMPASS apps.

No NEED to carry the camera ,, computer and GPS ,, do carry a paper map for the romance sake.


Take a nice one in the pannier ,, use the old one on the handle bar ,, like the fake wallet we carry.

Why carry,, telephone,, garmin ,, lap top ,, camera ,,

Remember ,, smart phones,,,
WATER PROOF ,,
DUST PROOF ,,
IMPACT PROOF ,,,
US Army is using it ,, so does British Military ,, Frech army since long ago,,, rugged enough for the battle field, on the hills of Afghanistan. Korean army uses it with a scrambler. One Iphone even saved a soldiers life,, blocking a bullett.
https://www.google.co.kr/webhp?sourc...smart%20phones

Time to catch up with changing times folks ,, technology evolution is coming our way.
garmin is an one trick pony ,, Google and Apple , with massive,, global App developers are keep churning out new mind blowing stuff every day.