Honest Mobile word mark

Keep essential apps connected with the ultimate second SIM

Unlimited data for 100+ essential apps

Use EE, O2 and Three in the UK

Connect to the best available network abroad
Join waiting list
You'll be in good company –
50,000 have already joined

Smart SIM has come to the rescue times

Join thousands already using Smart SIM

No more lost signal on your commute

Send WhatsApp messages, keep tabs on train times, and map to your next destination without disruption.

Say goodbye to expensive roaming

Automatically connect to the strongest available network from the moment you land. No more expensive roaming, wifi hopping or pesky data caps.

Unlimited data without the price tag

100+ essential apps at your fingertips, even when your main SIM runs out of data.

Smart SIM steps in where your main SIM falls short

Your main SIM
Smart SIM
£5/month
Join waitlist
Use
Main SIM
Second SIM
Multiple UK networks
No
EE, O2 & Three
Free global roaming
No
Yes
Includes
Calls and texts, social media, streaming and web browsing

Easier to set up than your main SIM

1
Join the waiting list
Feeling impatient? Refer friends to skip the queue faster.
Join waiting list
2
Add your Smart SIM
Create an Honest account and scan the QR code emailed to you.
3
Enjoy 3x UK signal and free roaming
Your Smart SIM will kick in whenever you lose signal in the UK or go abroad.

Peace of mind for just £5/month

Beta
By joining the waiting list you agree to Honest sending you marketing communications including the latest Smart SIM updates.

Imagine if every time you lost signal you could just hop onto another mobile network

(We’re Andy and Josh by the way, Honest’s founders 👋)
We built Smart SIM to make that a reality
It works alongside your main SIM to provide unlimited data on 100+ apps across three major UK networks, plus free roaming in 180+ countries.

So when your signal drops or you go abroad, you automatically connect to another network. Keeping apps like WhatsApp, Google Maps, Uber and Monzo at your fingertips, with unlimited data to boot.

Fed up with bad signal, dodgy wifi and expensive roaming? It’s time to get a Smart SIM.
Join waiting list

Got a question?
We’ve got the answer

What is Smart SIM?
Why haven’t I heard of Smart SIM before?
Can I manually switch between UK networks?
Does a Smart SIM replace my existing SIM?
Do I have to be an Honest customer already to get Smart SIM?
Which apps can I use with Smart SIM?
Can I call and text with my Smart SIM?
Does Smart SIM really work in 180+ countries?
Will Smart SIM always be £5/month? 
Is data really unlimited?
What’s the ‘beta’ all about?
When can I get a Smart SIM?
Is Smart SIM the same as an eSIM?
How can I get a Smart SIM?
What is an eSIM?
Can I make WhatsApp calls?
Where else can I get a Smart SIM?
Which networks can I use in the UK?
Don’t your SIMs use Three?
Can’t I use a browser/social media/streaming apps?