FrontlineSMS let users send, receive and manage SMS over a mobile network.

Ben Whitaker
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SIM card invalid: GSM network registration failed

error on connecting a phone to FrontlineSMS:"SIM card invalid: GSM network registration failed"if you see this message, and yet your SIM card works on other phones or with other programs, you have…Continue

Started Apr 16, 2009

solution for SMS receiveing problem with some SIM cards - remove PIN

Hi All,we've found that if your SIM card has a PIN code required, the current version of FrontlineSMS won't work. In the instances we've investigated you can send SMS, but cannot receive.The short…Continue

Started Apr 13, 2009

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Tell us about you. (Please also add an image to your profile)
Work at Masabi, involved in building the new FrontlineSMS system.
Very excited about people extending Frontline into server systems and building more interactive services through it, using scripting.
Also involved in encrypted SMS systems, and credit card transactions from mobile, such as transport ticket selling frmo the mobile. See our website for more info, or read our blog at

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At 5:32am on September 21, 2015, stella kwale said…

Good Day,

How is everything with you, I picked interest on you after going through your short profile and deemed it necessary to write you immediately. I have something very vital to disclose to you, but I found it difficult to express myself here, since it's a public site.Could you please get back to me on:( ) for the full details.

Have a nice day

Thanks God bless.

Mrs Stella.

At 5:11pm on April 13, 2009, Ben Whitaker said…
well, although the open source version of FLSMS is completely in the clear, we also produce end-to-end encrypted mobile messaging applications with similar ability, but with the encryption to protect the information, if required.

In most of our secure applications the purpose of the encryption is to provide secure banking or credit card payments to the latest international banking security standards, but they would be just as applicable for information exchange.

The benfit of coupling with distributed systems like FLSMS and SMS, and the low-specification phone support of FrontlineForms (the downloadable forms client for old and new phones) is that you don't need expensive smartphones, and you can set the system to work from anywhere you can send SMS.

We have a distributed system architecture that allows safe information exchange between parties via SMS where the central server, mobile network systems and any relaying systems are not a party to the data exchanged, and the vulnerabilities of the GSM A5 encryption algorithms are not an issue to data security, and the system can cope with the dissappearance of the central servers and operate islanded (quite key in most FLSMS deployments).

If you are interested in a further chat, send an email to
At 3:15pm on April 13, 2009, Ken Backes said…
Looking at both open and encrypted--THE major sticking point for info sharing among gov't entities is security of info (and vulnerability to hacking) military terms, the less "permissive" the environment we operate in, the higher security we need.

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