PM only offers roaming in the US so you would need a different sim to use in Europe. You could use Wi-Fi apps TextNow, Skype,.Fongo, or WhatsApp. You could use any web based email app.
@emvilliger Public mobile renegotiates international calling agreements on a regular basis. If a rate to country seems unreasonable for the bottom line or the demand is too low to jusify the expense (which i suspect with Switzerland and its not part of the EU) it was probably dropped. On the same vein you may get a high demand country added like the Philippines the next time contracts are up for negotiation.
@Kaleden Curacao is within the kingdom of the Netherlands but is its own country. It is likely a sim from Venezuela would cover Curacao and vice versa considering their close proximity.
@marilores If you are planning a trip to Europe you can purchase a European travel SIM online but if your entry country is within the UK buying one there offers the best deal for travel in the EU.