One of two things will happen if it's on silent.
1. When you click your lock button, you will see a message icon on the task bar. Pull that down and you can view it.
2. If it's on complete silence, as in no vibrations, a light will flash green intermittently, meaning that you have a text message. Hope this answers your question.
answered 4 months, 3 weeks ago
I don't believe the default messaging app has this feature. You may need to download a 3rd party messaging app from Google Play such as HandcentSMS or GoSMS.