# Migrating to our new public IP service

We're moving all public IP SIMs starting with **89103** to our new public IP infrastructure. This is a real upgrade: less packet loss, more bandwidth, fewer hops, and a static public IP with regional breakout in either the US or Europe.

This page explains what's changing, what you need to do, and how to make the APN change as painless as possible.

#### What's changing

Until now, public IP SIMs received a dynamic private IP that was NAT-ed and routed through an AWS EC2 instance. That setup had real limitations: significant packet loss from NAT gateway updates, asymmetry between the IP your device sees and the IP we see, limited bandwidth, and many hops.

The new infrastructure changes that:

* **Static public IPv4**, no more NAT in the middle
* **Choose your breakout region**: US-based POP (traffic appears to originate from the US) or Europe-based POP (traffic appears to originate from Europe)
* **Same IP on both sides**: your device sees the same address you do
* **Lower latency, higher bandwidth, far less packet loss**

{% hint style="info" %}
This migration lays the groundwork for our high-availability SIM (beta later this year) and our broader strategy of local breakouts globally.
{% endhint %}

#### What you need to do

1. Log in to [**dashboard.simbase.com**](dashboard.simbase.comhttps://dashboard.simbase.com/auth/signin)
2. Open the SIM you want to migrate
3. Click **Migrate** and follow the on-screen instructions
4. Update the APN in your device to **`fixedip.eu`** or **`fixedip.us`**, matching the region you selected
5. **Deadline: June 8**

#### Things to know before you migrate

* **Your public IP will change.** It's unavoidable, but the new IP is static and stays with the SIM.
* **Pricing is unchanged.**
* **No connectivity loss if you miss the deadline.** Your SIM will keep working, but it will fall back to a private IP behind NAT, which means remote access via public IP will no longer be possible. Change the APN and you're back to a public IP immediately.
* **Newly deployed public IP SIMs are already on the new infrastructure** as of today.
* **SIMs without public IP or private network services are not affected.** No action needed.
* **Private network customers**: we'll reach out individually to schedule your migration.

#### Tips for changing the APN

The APN change is the only operational lift in this migration. Here's how to make it easier depending on your hardware.

**Teltonika routers: change APN by SMS**

Teltonika routers accept remote APN changes via SMS, which means you don't need physical access or a VPN session. The command format:

```
 <router_password> mobilecfg apn1 fixedip.eu
```

Replace `<router_password>` with the router's SMS password (set under **Services → Mobile Utilities → SMS Utilities**) and swap `fixedip.eu` for `fixedip.us` if you chose the US region. Send the SMS to the SIM's though the dashboard. The router applies the change and reconnects automatically.

**Other vendors**

Most cellular routers and modules support remote APN updates over their management platform (e.g. Cradlepoint NetCloud, Sierra Wireless AirLink, Robustel RCMS, InHand iManager). If you have a fleet management tool, push the APN change there first and roll it out to a test group before the full fleet.

For embedded modules (Quectel, Telit, Sierra, u-blox), AT commands work over your existing serial or MQTT control channel:

```
AT+CGDCONT=1,"IP","fixedip.eu"
```

**Doing it at scale**

If you have hundreds or thousands of devices in the field, our recommendation:

1. Migrate a handful of SIMs in the dashboard first and update those devices manually to confirm your APN command works end-to-end.
2. Roll out to the rest in batches via your fleet management or SMS automation.
3. Use the dashboard to track which SIMs have come online on the new APN.

#### Questions?

Reach out to support and we'll help you plan the rollout. If you have a large fleet and want us to phase the migration with you, let us know.


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