LG Optimus F3 Quick Start Manual page 15

SOLUTION(S)
Turn volume up / unmute microphone.
Connect to Wi-Fi or move to a location with better signal.
Perform PRL and Profile updates.
Charge battery.
Try different charger.
Log in to Google Services by accessing Google Play Store.
Select "Refresh activation data" in Messaging app menu.
Use "Messaging"
.
Update/Install "FreedomPop Messaging" app in "Play Store".
Force close app: Go to "Settings">"App. Manager" >
"All apps">select frozen app in list>"Force Stop">"Clear Data".
Download "FreedomPop Voicemail"
Subscribe to service online or through "Messaging" app.
Log in to your account to manage services.
Log in and go to "Billing Settings" to manage this feature.
Add funds to card or log in and update billing information.
Log in and enable "Automatic Top-up" or add account credit.
.
Troubleshooting
app to make texts successfully.
from "Play Store".