Unlock code for a nokia 6121c

SOURCE: Nokia 6300 unlock code

NO NETWORK IN NOKIA 6300

SOURCE: Nokia 6500 Classic unlock

BB5 type phones such as 5200,5300,6085,6280,6300,6500
6630, 6680,6681, 6682 or
any N-Series phones,N-70, N-90 or E series,E50,E60 etc
or Tracfones can not be unlocked by the method of code calculation for
use with another Network. Not yet.
Only the original service provider can provide a code to unlock them.
Our Calculators can not do codes for these.
Be careful.
I understand that you only have three chances. If you
hard lock the phone by entering wrong codes, not even
the original Provider can unlock it by code.
ALSO
These models cannot be unlocked as yet by this method.
Those below are ASIC 11 or DCT4 Plus
There is computer software available and being developed
for new hardware that will unlock these.
ASIC-11 is a new type of lock that i do not have information about. But try the special shop, they should have it, will cost around €40

1110i RH-93,1112,2310,2610,2760 etc.(1600b V 5.01 RH-65)
The original service provider can provide a code to unlock them.
Should be doable by cable+hardware.
BB5, 6030 RM-225
Not doable by FREE means.
Only the original service provider can provide a code to unlock them
or a Professional Shop with Equipment except the 6061 RH-98,
only your network can unlock this model.
Take care!

SOURCE: Nokia 6300 unlock

as vrea sa ami decodati telul plizz

SOURCE: Nokia 6300 Australia Vodafone requesting restriction code

Handset Unlock - Instructions
Please find below the instructions to unlock your handset.

Handset Unlock Procedure for IMEI: 353508029865248
Your unlock code is: 426850229882845
Manufacturer/Model: Nokia_6300

Nokia 6300
PHONE UNLOCK PROCEDURE
PLEASE READ THE INSTRUCTIONS CAREFULLY BEFORE YOU ATTEMPT ANY UNLOCK PROCESS
This procedure unlocks the handset from being network restricted from only using SIM cards from Vodafone Australia. In case of difficulties, please refer to the FAQ listed below
1. Take note of the unlocking code shown above
2. Insert a Non-Vodafone Australia working SIM card.
3. Ensure the phone is charged and then switch the phone on.
4. Optional Step: If the SIM card has a PIN, enter your PIN number. (See FAQ below)
5. The phone will then display a message. The most common is “Phone Restricted”. Select “undo” by pressing the middle soft-key button. (Different message? See FAQ below)
6. Carefully read step 6 before attempting to enter the unlock code. This step has the potential to PERMANENTLY BLOCK YOUR PHONE!
Enter into the phone #pw+ followed by the 15-digit unlocking code then +1# (Unlocking code is shown above). Do not enter the 15-digit IMEI number by mistake
To enter + press the * (star) key two times
To enter p press the * (star) key three times
To enter w press the * (star) key four times
For Example: If your 15-digit unlocking code is 123456789012345, enter the following in sequence: #pw+12456789012345+1#
(When entering the unlocking sequence it disappears? See the FAQ below)
7. Then press “OK”
8. The handset will display “Phone restriction off” unlocked after successful entry of the unlocking code. This will be confirmed if you can make and receive calls with the Non-Vodafone Australia SIM card. (You will need reception and phone credit with the different network provider)

SOURCE: How do i unlock my nokia 6630? If possible without

So according to you, you are having a Network or Sim lock or Subsidy or Restriction. If you have any of the above Locks, unfortunately the problem can't be solved. For it you have to contact the Service Provider anyway. They are the only one to provide the code.
Thank you, Have a nice day.