Ever been hit by absurd roaming charges on your smartphone? We have, and it’s no picnic. KnowRoaming [partly] remedies this problem with a simple one time application SIM sticker, eliminating the need to swap SIMs and purchase local prepaid phone plans. Working with of carriers in 220 countries, KnowRoaming remains on the sidelines, at least until you step into foreign territory, at which point it automatically switches you over to a local provider for savings of up to 85% on voice and data. It also automatically forwards all your calls from your regular number, gives you full control of what you pay while keeping tabs on current rates, and includes an easy to use applicator for affixing the sticker to your SIM.

Hit up Amazon for details Р$25