What if my eSIM is not connecting on iPhone 12 Pro Max?

Open LTE.app and tap Smart Coach. It checks your APN settings, data roaming toggle, and carrier connection automatically — even without mobile data. Most eSIM connectivity issues are fixed in under 60 seconds.

iOS✓ eSIM CompatibleApple · 2020

How to Install an eSIM on iPhone 12 Pro Max

Q: Does iPhone 12 Pro Max support eSIM?

Yes, iPhone 12 Pro Max (2020) supports eSIM. iPhone 12 Pro Max supports eSIM with dual SIM (nano-SIM + eSIM).

Q: Can I use two SIMs at the same time on iPhone 12 Pro Max?

Yes. iPhone 12 Pro Max supports Dual SIM — one physical SIM and one eSIM active simultaneously. This is ideal for keeping your home number while using a travel eSIM for data abroad. Go to Settings → Cellular to manage both lines.

iPhone 12 Pro Max supports eSIM with dual SIM (nano-SIM + eSIM). Follow the steps below to activate your LTE.app eSIM on iPhone 12 Pro Max in minutes.

Step-by-step eSIM installation — iPhone 12 Pro Max

Go to Settings → Cellular → Add eSIM

Tap "Use QR Code" and scan the QR code from your LTE.app order

Follow the on-screen prompts to complete eSIM setup

Label the new plan (e.g., "Travel Data") for easy switching

Set the new eSIM as your primary data plan when you arrive

Before you install — checklist

✓Your device is connected to Wi-Fi during installation

✓Your device is not carrier-locked (check with your carrier)

✓You have your LTE.app QR code ready (sent to your email after purchase)

✓You are running the latest iOS version

✓You have enough battery (20%+) to complete setup

Tips for iPhone 12 Pro Max

Label your eSIM

After installing, label the plan in Settings → Cellular → Add eSIM → tap the plan → Label. Use "Travel Data" so you can switch easily.

Set data roaming on the eSIM

Go to your cellular settings and make sure data roaming is enabled for the eSIM line. Keep it off on your home SIM to avoid charges.

Activate when you land

The eSIM data plan starts counting when it first connects to a local network. Install at home, activate when you arrive.

Smart Coach on LTE.app

If your eSIM is installed but not connecting, open LTE.app and tap Smart Coach. It diagnoses connectivity issues step-by-step, even offline.

Get an eSIM for your iPhone 12 Pro Max

196 countries covered · Plans from $1.53 · Instant QR delivery · Pro members save up to 12%

Browse eSIM plans →All device guides

Popular destinations for iPhone 12 Pro Max users

Browse eSIM plans by destination — or pick a trip length to see plans that cover your exact travel window.

Japan — 7-day plans Thailand — 7-day plans South Korea — 7-day plans France — 7-day plans UAE — 7-day plans UK — 14-day plans Australia — 14-day plans Indonesia / Bali — 7-day plans Italy — 10-day plans Germany — 7-day plans Singapore — 5-day plans Vietnam — 14-day plans

Browse all 196 countries →

Frequently asked questions

Does iPhone 12 Pro Max support eSIM?

Yes, iPhone 12 Pro Max (2020) fully supports eSIM. iPhone 12 Pro Max supports eSIM with dual SIM (nano-SIM + eSIM).

How do I find eSIM settings on iPhone 12 Pro Max?

Go to Settings → Cellular → Add eSIM to access eSIM settings on iPhone 12 Pro Max.

Can I use two SIMs at the same time?

Most recent iPhones support dual SIM — one physical SIM and one eSIM active simultaneously. This is ideal for keeping your home number active while using a travel data eSIM.

What if my eSIM is not connecting?

Open LTE.app and tap Smart Coach. It will walk you through APN settings, roaming toggles, and carrier-specific fixes step by step — even if you have no mobile data.