Configure APN settings (Connect Router to the Internet with a SIM)

This guide covers configuring the mobile (cellular) WAN connection on a Proroute router. It applies to all Proroute 4G and 5G models. For dual-SIM variants, the same settings apply to each SIM slot independently.


Overview

The router connects to the mobile network using a PDP context, which requires a correctly configured APN (Access Point Name). The APN identifies the packet data network the SIM should connect to and determines routing, IP assignment, and authentication.

  • Standard consumer SIMs (e.g., EE, Vodafone, Three, O2) — the router may auto-detect the APN from the SIM. Manual configuration is not always required but is recommended for reliability.
  • IoT / M2M SIMs with private APN — manual APN configuration is required. These SIMs often provide a fixed IP address and/or route traffic over a private network or VPN tunnel. The APN, authentication method, username, and password are provided by the SIM supplier.

If you do not have the APN details, contact your SIM provider. For standard consumer SIMs, the APN can also be found on the mobile network operator's support pages.


Prerequisites

  • Router is on the latest firmware
  • Router is at factory default settings (recommended for initial setup)
  • SIM card is activated by the provider
  • SIM is inserted into the router's SIM slot
  • All cellular antennas are connected to the CELL connectors
  • Router is positioned with adequate signal coverage for the SIM's network

Configuring the mobile connection

Location in WebUI: Network > Mobile

From factory defaults, most SIMs require only the APN and authentication fields to be set. Configure the following:

APN

Enter the APN string provided by your SIM supplier (e.g., internet, everywhere, m2minternet). The APN is case-sensitive on some networks — enter it exactly as provided.

Authentication Method

Select the method specified by your SIM provider. Common values:

Method When to use
None No authentication required (common for standard consumer SIMs)
PAP Password Authentication Protocol — most common for IoT/M2M SIMs with credentials
CHAP Challenge Handshake Authentication Protocol — used by some providers

When an authentication method other than None is selected, Username and Password fields will appear. Enter the credentials provided by your SIM supplier. If no credentials were provided, leave them blank.

Mobile Connection Mode

Leave set to DHCP (default) in almost all cases.

Important: If your SIM provides a static IP address — whether a private IoT/M2M IP or a fixed public IP — you still need to use DHCP. Mobile networks deliver static IP assignments via the DHCP protocol; the static address is assigned to your router by the network, not configured locally. Switching to static IP mode on the router will prevent the connection from establishing. Only change this setting if your SIM provider has explicitly instructed you to use a static IP configuration.

After making changes, click Save and Apply and allow 60–90 seconds for the connection to establish.

Mobile Settings
SIM 1
Enable
 
Mobile connection
DHCP mode
IPv4v6
IPv4 only
IP Passthrough
 
PIN code
 
PUK
 
Dialing number
*99#
APN
 
Authentication method
None
Username
 
Password
????
Dual APN support
 
Network Type
automatic
MTU
1500
Online mode
Keep Alive
Metric
0
IPv4 netmask
 
Default route
 
Save

Verifying the connection

Location in WebUI: Status > Overview

The SIM status indicator shows:

  • UP — connected to the mobile network and passing traffic
  • DOWN — no active connection

For further detail including assigned IP address, signal strength, and active band, go to Status > Mobile.


Full settings reference

Setting Default Notes
Mobile Connection Mode DHCP Leave as DHCP in all cases — including SIMs with a fixed static IP (see note above)
APN Blank Enter APN provided by SIM supplier
Authentication Method None Set as required — see above
Username Blank Only if authentication method requires it
Password Blank Only if authentication method requires it
PIN Code Blank Enter SIM PIN only if the SIM has PIN lock enabled
Dialing Number *99# Do not change unless explicitly instructed by provider
Network Type Automatic Set to 4G (LTE) only to lock to 4G; Automatic allows the modem to select the best available generation
IP Passthrough Disabled Enable only if using IP Passthrough mode (passes the SIM's public IP directly to a connected device)
Dual APN Disabled Enable only if your provider requires a secondary PDP context
MTU Auto Automatically negotiated — only override if advised by provider
Online Mode Keep Alive Maintains persistent connection; leave as default
Default Route Enabled Leave enabled if mobile is the primary WAN interface

Connection timing

Most SIMs connect within 60–90 seconds. First-time connections on multi-network or roaming SIMs may take up to 15 minutes as the modem scans and registers to a network.


Troubleshooting

Symptom Likely cause and action
SIM status remains DOWN Check APN, authentication method, username, and password — confirm all with your SIM provider. Verify the SIM is activated.
SIM status shows UP but no internet traffic Incorrect routing configuration or IP Passthrough misconfiguration. Check Default Route is enabled. Check firewall rules.
No signal / signal shows 0 Antennas not connected, poor coverage, or SIM not registered to a network. Verify antenna connections and relocate if necessary. Check Status > Mobile for network registration status.
SIM connects then drops intermittently Weak signal or Keep Alive not functioning. Check signal strength at Status > Mobile. Consider enabling ICMP check (ping reboot) to auto-recover — see the ICMP Check / Ping Reboot guide.
Authentication failure / PDP context rejected Incorrect authentication method, username, or password. PAP and CHAP credentials are case-sensitive. Confirm with provider.
Fixed IP not assigned (IoT/M2M SIM) The router's WAN IP should match the fixed IP assigned by the provider. If it does not, verify the private APN string is correct and that the SIM is provisioned for fixed IP on the provider's platform.