Check for unusual battery drain
Check for unexpected data usage spikes
Look for strange background noise during calls
Watch for delayed shutdowns or restarts
Notice if the phone gets unusually hot when idle
Check for unfamiliar apps or profiles
Review app permissions for anything suspicious
Look for random pop-ups or redirects
Check if texts are sent or received without your action
Watch for poor call quality on multiple networks
Scan for malware using a trusted security app
Update the phone’s operating system
Remove unknown apps and suspicious device admin access
Reset network settings if problems persist
Back up important data and perform a factory reset if needed
Contact your carrier if you suspect call or SMS interception