The tinny echo of my sister's voice cracked through the phone receiver, each syllable costing more than my morning coffee. "Can you hear me now?" she shouted from Lisbon, her words dissolving into static just as she described our nephew's first steps. My thumb hovered over the end-call button, heartbeat syncing with the blinking call timer – £2.37, £2.49, £2.61 – a cruel countdown stealing intimacy. That metallic taste of panic? That was the flavor of distance before Duo Voice rewrote the recipe
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