Hola, Bargainitos!
I shall soon be going to Germany, France, England and Italy. I know zippity-doodah about foreign mobile stuff. The best I can do for myself is check if my phone uses the correct "bands".
What I and my companion have now:
Kogan Agora 6 Plus (4G LTE, dual-sim) on Kogan Mobile's 1.5gb plan.
Samsung Galaxy Note 3 on Boost $40 plan.
The Samsung user is planning to buy a secondary, cheap, dual-sim Android phone for the trip.
I'm pretty comfortably checking if SIMs and plans are compatible with our handsets. What I would like to know is what SIMs to buy, and some general tips on activation, etc.
What we'd really like is to be able to call one another (for emergencies), be able to text one another (as much as possible) and have around 3-5gb of data (as we will have wi-fi in our hotels, etc. and assume there is as much free wifi around as there is here).
We're not fussed about using a single SIM for all countries or swapping in each country. That's part of the dual-sim appeal.
We understand we could use data sims and communicate via things like Viber and we would consider this for an amazing data plan, but would prefer not to. We're fairly old-school.
Thanks in advance, folks - if anyone will steer me right, it's all'a y'all.
Here is the research I've done two years ago https://www.ozbargain.com.au/node/194218 We ended up using a German Ortel SIM cards (bought locally from https://www.travelgear.com.au/europe-sim-cards/)
But now the new roaming rules are effective (free roaming across Europe zone) you should be able to find better deals on http://prepaid-data-sim-card.wikia.com/wiki/European_Union
Feel free to ask if you have any question, will try to answer as much as I can.