Expired otksl ---no SERVICE but I am paying what the heck???? wish aI had not bought this phone
If you purchased the phone together with the service contract, contact your phone service provider's customer support.
If you purchased the phone separately as a new device, contact the seller for a replacement.
If you purchased a second-hand phone, this phone was bound to a service contract and will work with the original SIM card only. The OTSKL acronym stands for "One Time Keypad Subsidy Lock" and as the name says, it can be used one time only to register to a network.
For reference, see US Pat.
6314283:
"A cellular phone subsidy lock which ensures that a cellular phone,
sold to an end-user at a price subsidized by a cellular carrier, is
activated only on the subsidizing carrier's network, and not on a
competitor's network. A secure carrier code, specific to and known by
the subsidizing carrier, is programed into the cellular phone by the
phone manufacturer. The phone is programmed and shipped by the
manufacturer in a locked condition, which prevents programming of the
NAM (Number Assignment Module) of the cellular phone without first
entering either a valid unlock code or a valid remove lock code. At the
time of phone activation and programming of the NAM, the phone's ESN
(Electronic Serial Number) is entered into the carrier computer system,
which utilizes the ESN and carrier code to execute a subsidy lock
algorithm which outputs an unlock code and a remove lock code. At the
carrier's choice, either code is given to the end user to be entered
into the phone. The phone then executes the same subsidy lock algorithm,
using the carrier code programmed at the time of manufacture, and it's
own ESN, to calculate the unlock code and the remove lock code. If the
code entered by the user matches the unlock code, NAM programming is
allowed to proceed only once, and if the entered number matches the
remove lock code, the phone removes the subsidy lock completely."
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