Unit 2A, 17/F, Glenealy Tower, No.1 Glenealy, Central, Hong Kong S.A.R.
Contact
Ask us anything about SimTether
A small team answers these directly. There is no ticket queue and no chatbot.
Where to find us
Four ways, one of them fast
The form at the bottom of this page is the quickest, because it reaches the people who wrote the software.
Office
Unit 2A, 17/F, Glenealy Tower, No.1 Glenealy
Central, Hong Kong S.A.R.
Central, Hong Kong S.A.R.
Hours
Monday to Friday, 09:00 to 18:00 Hong Kong time. Expect an answer within one working day.
What happens next
From your message to an answer
No automated reply pretending to be a person.
1
It reaches a person
The form opens a private support conversation and alerts our team. Read replies in that conversation. Messages are deleted after 90 days of inactivity.
2
We read it the same day
During Hong Kong office hours, usually within the hour. Outside them, the next working morning.
3
You get a real answer
Written by somebody who knows how the system works, including when the answer is that it cannot do what you asked.
4
We keep nothing extra
Your message and your address are used to reply to you and for nothing else. There is no mailing list you have been added to.
Before you write
What helps us answer properly
Not required, but it saves a round trip.
- Which phone is at home, and roughly how old it is
- Which country the SIM belongs to, and which one you are in
- How many SIMs you need to reach
- Whether the phone at home has permanent power and wifi
- What you tried already, if something is not working
Read this first
Three pages that answer most of it
If your question is here, you have your answer in a minute instead of a day.
Questions
Asked often enough to write down
The rest of the honest answers are on the how it works page.
What does it cost?
The Android forwarder is free. On iOS, confirm the free 30-day trial in the App Store. After it ends, live features require a one-time lifetime purchase: US$1.99 during the first 90 days after launch, then US$5.99, with local prices elsewhere. There is no automatic charge. Your carrier still bills SMS and data normally.
Do you sell my data?
There is nothing to sell. There is no account, no profile, no analytics, and the message text on the server is sealed and deleted as soon as it is delivered.
Can I use an iPhone at home instead?
No. iOS does not let an app take over SMS the way Android does, so the phone that holds the SIM has to be an Android one. The phone you carry is the iPhone.
Does it work with more than one SIM?
Yes, with one handset per SIM. Each conversation stays tied to the SIM it belongs to, so a reply always leaves on the right number.
Is it end to end encrypted?
Not in the strict sense, and we will not claim it is. The SMS crosses the mobile network in the clear and the relay seals it on arrival rather than the handset sealing it before sending. The privacy page explains exactly where the boundary sits.
When can I install it?
The relay is live and the apps are built and tested. The iPhone app has not been published on the App Store yet. Write to us and we will tell you when a test build is available.
Get in touch
Tell us what you need to reach
One SIM or four, one country or three: describe the situation and we will tell you honestly whether this solves it.
Head office
Unit 2A, 17/F, Glenealy Tower, No.1 Glenealy, Central, Hong Kong S.A.R.
Email us
contact@simtether.com
SimTether
Read your home SIM's texts on your iPhone and reply from the same number. Try iOS free for 30 days; Android forwarding stays free.
Contact
Unit 2A, 17/F, Glenealy Tower, No.1 Glenealy
Central, Hong Kong S.A.R.
contact@simtether.com
Monday to Friday, 09:00 to 18:00 HKT
Occasional updates
One short email when there is something real to say, such as the app reaching the App Store. Nothing else.
SimTether is software for reaching your own messages. It is not an operator, it does not issue numbers, and it does not port anything.
© 2026 HK Managed Services Provider Limited. All rights reserved.