In 2016 and 2017 I couldn't find a phone mount, or any mount, that worked for my motorbike. So I did my adventuring without using a GPS while en-route. Memorizing the road, I rode all over the Philippines on my dinky little Honda XRM125 and later a XR-150L.

The process was rather simple. In the morning I'd look on Google maps where to go that day, usually a town 200 or so kilometers away. And I'd memorize big junctions or some kind of landmark for turns. En route, often I just kinda winged it. Along the way I might stop and ask the way, or if nobody was around hope that the internet worked and look on Google maps again. Often there was no internet, or only a 2G network with no bandwidth.
Roadsigns were pretty much non-existent at the time. There were a few, but only on the main roads, and only for larger towns and cities. Most junctions were unmarked. Towns rarely have a sign with their name on it either. So you can't really plan on going left in this or that town, since you rarely know what town you're in without looking on a map or asking for the name. No, navigation like that had to be done by memory if you didn't bring a GPS.

But I managed just fine. Sometimes not so fine, and I'd end up in weird places. But overall the road system in the Philippines isn't all that complicated. I did also carry a paper map with me, one of those big folding things that always tear if you unfold them too often, but I rarely used it. Instead I marked the route on it as a memory to keep rather than use it to find my way.

Later on, when I finally found a couriet who would ship Amazon stuff to the Philippines through an intermediary in Los Angeles in the United States, I had a set of panniers and a phone mount shipped in from the USA. This helped a lot. But offline maps were still a luxury - The apps for Android were poorly developed back then. Plus many phones didn't have a compass or reliable GPS chip. Not the phones available in the Philippines anyway. So that didn't exactly work smoothly either. But I managed.

After I moved to Mexico I finally started using a phone for a GPS, and for pretty much all my out-of-city rides I use a GPS now. I have a cheap secondary phone without a sim-card, loaded with maps apps and relevant tools. The software improved a lot and I can plan rides ahead of time on my laptop using GPX routes.

Some of these routes you can download from this website - Check them out here.