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SIMLock  by  Benjamin PannellSecurity / Encryption category

 My-Maemo user rating: 90% (3 votes) (3 votes), 3 comments(s)

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Locks the phone if the SIM card is changed.

SIMLock will automatically lock the phone if it detects a different SIM card being used in the phone. The lock code can be configured from the Settings/Device Lock page and should be set prior to installing SIMLock.

Failure to do so may result in you being locked out of your phone and may require you to flash it.

SIMLock for Nokia N900 / Maemo 5

When your phone is started up after installing SIMLock your current SIM Card's unique identifier, known as an IMSI, is stored. Each time the phone is started after that the current SIM Card's IMSI is compared to the original one. Should SIMLock find that your SIM Card's IMSI is different it will automatically lock the phone and put it into Offline Mode. Once the phone has been unlocked again SIMLock will add the current SIM Card's IMSI to the list of "allowed" IMSI numbers and it will not bother you again. The concept is modeled on the functionality found in the original Symbian UIQ Operating System and its purpose is to make it more difficult for someone to access your phone should they steal it.

SIMLock provides an added level of security should your cellphone be stolen. While not being completely bulletproof the aim is to make it just that much more difficult for a thief to use your phone after he has stolen it.

If you want to change your SIM card, all you need to do is swap it and turn the phone back on. When you enter the unlock code it will automatically allow that SIM card from then on, this prevents the phone from bothering you once you have authorized a SIM card.

Can it be bypassed? In short, yes, however in order to do so the phone must be flashed which in itself makes it more difficult for someone to make use of your phone. Coupled with the fact that N900s are not the most common phones around and it makes this quite a pain for anyone who has stolen your phone to get past. Also, due to the point in the boot process that SIMLock activates it makes it extremely difficult for someone to remove it before the phone is locked.

Company / Maintainer
Contact or Home page
Average user rating
90% (3 votes) (3 votes)
User comments
Compatible phones
(unless stated otherwise in the program description above)

  User comments for  SIMLock

NameComment and rating
  brown jean
from Somewhere on Earth
on 2014-02-13 07:04 CET
very usefull app. [Rate: 10/10]
from Somewhere on Earth
on 2012-06-21 06:24 CET
nice one [Rate: 8/10]
on 2011-06-27 15:17 CET
What a good app for my N900 thank man. [Rate: 9/10]

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