Brand: D-Link
Category: Networking
Document Type: Manual
Language: EN
Manual for DWR-720P
Uploaded: Sept. 12, 2025, 4:22 a.m.
Manual Publish Date: 2018-01-01
Warranty Information
Refer to the manual for specific warranty information, as it is not explicitly stated in the provided pages.
Powering On/Off: Press and hold the Red Power Key to turn the phone on or off. A welcome message and music may play.
SIM Card Installation: Ensure the phone is off. Open the battery cover, insert the SIM card into its slot, then replace the cover.
Basic Functions: Make calls by direct dial or from the contacts list. Receive calls by pressing the Green Dial Key or picking up the handset. Terminate calls using the Red Power Key or hanging up.
Messaging: Access messaging via the Menu or the SMS key. Write, send, receive, and manage SMS messages.
Contacts: View, add, and search for contacts. Speed dial can be configured for M1-M4 keys.
Settings: Customize phone settings including date/time, language, display, call settings (network selection, call divert), security (PIN, power-on password), and profiles.
Troubleshooting: Refer to FAQs for common issues like PIN/PUK codes, poor sound quality, network errors, and battery life.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
|---|---|---|
| "Enter PIN code" appears | Incorrect SIM PIN entered. | Enter the correct SIM PIN code. Contact your Network Provider if unknown. |
| "Enter PUK code" appears | Wrong PIN entered three times. | Enter the PUK code. Contact your Network Provider if unknown. SIM will be hard locked after ten failed PUK attempts. |
| "Insert SIM card" appears | SIM card not installed correctly or faulty. | Ensure correct installation. Test SIM in another device. Contact Network Provider for replacement if faulty. |
| Poor sound quality, echo, noise | Network line quality. | Hang up and redial. If the problem persists, contact your Network Provider. |
| "Not in service area. Network failure." | Poor signal or outside coverage area. | Check signal indicator. Move to a location with better signal. Contact Network Provider if out of coverage. |
| Battery Life/Standby Time declines | Weak signal searching, or battery lifespan reached. | Power off the phone when not in use. Replace the battery if it has reached its lifespan. |
| Phone fails to boot | Battery not charged. | Charge the phone until battery power is restored, then try to power on again. |
| Cannot send short messages (SMS) | Incorrect recipient number, invalid number, or insufficient funds. | Verify recipient number and credit. Check if message center number is valid. |
| Cannot add entries into phonebook | Phonebook is full. | Delete some useless entries. |
| Cannot charge | Charger faulty, incorrect ambient temperature, or poor contact. | Contact nearest service provider for charger. Adjust charging environment. Check charger plug. |
| Cannot select some functions | Service not available or not supported by the network. | Contact your operator for details. |