> For the complete documentation index, see [llms.txt](https://docs.jtokenapp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.jtokenapp.com/router-v519/configuration/network/lte.md).

# LTE

## LTE

In this section, it allows the user to configure LTE. By default, it’s LTE Gateway mode for V519, just inserting 4G/3G SIM card, later router will auto recognize and register to corresponding network of 4G/3G. You can also configure and select ISP. Please check below details:

![](/files/-MSwDyY94yEKMoyKnehq)

### Attach Mode

* It's okay to lock 4G/3G/2G, but it's recommended to select "Auto" mode.

### Maintain Network Mode

* Lock 4G or 4G/3G; Disable by default.

### Custom APN

* Please enter the APN information provided by ISP. The APN information of the domestic three ISPs in China for your reference as below:

| ISP                 | 3G/4G                              | APN   | Dial Number | User  | Password |
| ------------------- | ---------------------------------- | ----- | ----------- | ----- | -------- |
| China Mobile        | <p>TD-SCDMA,</p><p>TD-LTE, GSM</p> | cmnet | \*99#       | blank | blank    |
| China Unicom        | <p>WCDMA,</p><p>FDD-LTE, GSM</p>   | 3gnet | \*99#       | blank | blank    |
| China Telecom 4G    | FDD-LTE                            | ctnet | \*99#       | card  | card     |
| China Telecom 3G/2G | CDMA200, EVDO                      | ctnet | #777        | card  | card     |

### Dial Mode

* It's recommended to select "Advise" mode. Once failed to dial or abnormal, it's suggested to select "PPP" mode. But for other modes, it's not recommended.

### Availability Check

* When enabled, it will check whether network is normal in the light of data packets. If abnormal, it will dial again. Therefore, it's strongly recommended to enable it.

### GPS

* Used to enable or disable GPS here. Disable by default.


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