>The Russians brought their own cellphones into Ukraine. When the Ukrainians figured this out, they cut off Russian phone numbers from the Ukrainian network — s

>The Russians brought their own cellphones into Ukraine. When the Ukrainians figured this out, they cut off Russian phone numbers from the Ukrainian network — so the Russian phones stopped working. >Russian troops then began seizing cellphones from Ukrainian civilians, according to Ukraine's State Service of Special Communications and Information Protection. >"We call on Ukrainians whose mobile phones were taken away by representatives of enemy troops to inform the operator as soon as possible," the Ukrainian agency said in a statement last month. >Ukrainian civilians have complied, and this let the Ukrainian government know which phones were stolen by the Russians — and effectively became listening devices for the Ukrainians.