Understanding the SM-G920T NV Data File: What It Is and Why It Matters

In 99% of these cases, the culprit is a corrupted or missing .

Is your Samsung Galaxy S6 (SM-G920T) showing a “Null IMEI” or “No Service” error? The NV Data file might be corrupted. Learn what this critical file does and how to fix it. If you own a Samsung Galaxy S6 (Model: SM-G920T) — the T-Mobile variant of Samsung’s 2015 flagship — you might have come across a frustrating problem after a failed custom ROM flash, a bad root, or a software update. Suddenly, your phone shows “No Service,” “Null IMEI,” or “Unknown Baseband.”