Delorme SE is a far more versatile tracker than SPOT and works far more reliably way down south. A little more expensive but having two-way messaging to any mobile or email address in the world and SOS verification is worth it. Both can be integrated with Spotwalla to give permanent maps available to anyone you choose.
Big money to be saved by taking dollars into Argentina and changing them on the black market, "dolarblue'.
We've been into towns where all ATMs were down for the day, or where credit cards weren't accepted, so if we hadn't had cash to change into local currency so we could buy fuel and food, we would still be there
We mainly use a debit card to withdraw maximum amounts of cash (which is pretty low in some countries) at ATMs and use that for all payments, but have two different credit cards as backups. Plastic cannot be relied on so cash is still king. Bolivia for instance has ATMs everywhere, but petrol stations seemed to be cash only
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