Dual SIM Call Dropping Fix: Is It a Bug or Just How Dual SIM Works?
Dual SIM Call Dropping Fix: Is It a Bug or Just How Dual SIM Works? By Chester Takau · July 2026 Short answer: Most "dropped" calls on a second SIM aren't drops at all — almost every dual SIM phone shares one radio, so the inactive line shows "No Service" while you're on a call and can't ring through. That part is normal. The real fixes are: turn on VoLTE for both lines if your carriers support it, enable Wi-Fi Calling on the SIM that goes quiet, check whether a recent iOS or Android update broke something, and confirm you're not simply dialing out on the wrong line. If your second line shows "No Service" or fails to ring while you're on a call with the first, that's usually the phone doing exactly what it was built to do — not a fault. This guide separates the behavior every dual SIM phone shares from the fixable bugs (bad VoLTE settings, carrier provisioning, buggy firmware) that actually cause real call drops, and wa...