[dropcap size=small]T[/dropcap]he last thing anyone wants after clearing the customs quagmire is to join another queue for an overseas SIM. Or be greeted with exorbitant roaming rates upon return from abroad.

Well, bid those secondary queues and fumbling with fingernail-sized chips goodbye. Interfone, a Singapore based firm, solves all that with a sticker that goes on your current SIM. Once installed – it takes a literal minute – you only need to flip a switch in its companion app, and you’ll be hooked up to telcos in the country you’re in.

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Expect clear call quality, good satellite and data coverage, and significant cost savings (prices are said to be up to 90 per cent cheaper than regular roaming plans), thanks to the deals Interfone has struck across nearly 100 territories including Argentina, the Turks and Caicos Islands, and Iran. The best part? You get to keep your existing number, so no more having to update every last business associate on changes, or missing out on prospective deals.

Order at www.interfone.com; the kit will be mailed to you. If you have employees that fly frequently, consider a corporate package.