How to Access Native SIP / VoIP Account Settings Across Different Android Versions

Many Android releases include a built-in native SIP client directly integrated into the system Dialer application, allowing users to make and receive VoIP calls over Wi-Fi and mobile data without installing third-party battery-draining apps. However, OEM custom skins (Samsung, Huawei, Asus, Xiaomi) frequently relocate the configuration menu.

Native SIP Client Path Reference by Android OS Version

• Android 4.2.2 (Jelly Bean):
  Dialer App → Menu → Settings → Internet Call → Accounts
• Android 5.0 / 5.1 (Lollipop):
  Phone App → Settings → Call Settings → Phone Account Settings → SIP Accounts
• Android 6.0 (Marshmallow) & 7.0 (Nougat):
  Phone App → Three Dots Menu → Settings → Calling Accounts → SIP Accounts
• Android 8.0 (Oreo) through Android 11:
  Phone App → Settings → Calls → Calling Accounts → SIP Accounts → Add (+)

Note: In Android 12 and newer, Google deprecated the legacy built-in SIP stack. For modern Android releases, standard standalone clients like Linphone, Grandstream Wave, or MizuDroid are recommended.

How to Configure VoIP SIP Settings on GreenPacket DT-350 4G Routers

The GreenPacket DT-350 TD-LTE indoor router includes an integrated hardware VoIP FXS port (RJ-11) for connecting analog telephone handsets directly to SIP servers (such as Asterisk, FreePBX, or telecom IMS gateways). However, on many telecom-branded firmwares (such as Irancell), the VoIP menu is hidden from standard administrative accounts.

Hardware: GreenPacket DT-350 TD-LTE Router • RJ-11 POTS Handset • SIP Protocol

1. Accessing Hidden VoIP Menus

Log in with the root/operator credentials (or inspect the web GUI source to reveal hidden navigation items under /voip_settings.html or /sip.html).

2. SIP Account Configuration

SIP Proxy / Registrar: YOUR.PBX.SERVER.IP
Port: 5060
SIP Transport: UDP
Outbound Proxy: (Optional, set if behind telecom NAT)
Account / Display Name: 101
Authentication Username: 101
Secret / Password: YOUR_SIP_SECRET
Codec Priority: G.711u (PCMU), G.711a (PCMA), G.729

Save and apply settings. Once registered, the Phone LED on the router faceplate illuminates solid green, and connected analog handsets will receive dial tone.