Bought a t mobile sidekick 3 off ebay in uk and got a t mobile sim to put in, the phone asks for a sim lock code, i have tried 1210 which it said on the sim but its not working, tried to contact seller but she has not got back to me yet.Please help

try code from service provider....................

To unlock the Sidekick 3 from T-Mobile Network lock,you can use the Unlock code,You can get the Unlock code from here
Unlocking4u and get the free unlocking instructions below and Unlock it step by step...

Sidekick 3 Unlocking Instructions Warning : Do not enter any wrong unlock codes on your Sidekick 3 mobile phones. If you enter over a certain amount of wrong unlock codes on your Sidekick 3 mobile phone, your phone may get hard locked and sometimes become unusable.
1. Switch ON your Sidekick 3 with a Not ACCEPTED SIM Card.
2. If your Sidekick 3 asks for a PIN code, then enter your SIM card PIN and press OK.
3. Sidekick 3 will ask to enter an "unlock code".
4. Enter Unlock Code we send to you.
5. Your Sidekick 3 is now unlocked.

It says just Network lock only,You need to enter the Code if it locked Network mean.You can get the Unlock code at here
http://www.superunlockcodes.com/sidekick-lx-2009/rs12wp9/ and Unlock it,get the Unlocking Instructions below to unlock it step by step.
Sidekick LX 2009 Unlocking InstructionsWarning : Do not enter any wrong unlock codes on your Sidekick LX 2009 mobile phones. If you enter over a certain amount of wrong unlock codes on your Sidekick LX 2009 mobile phone, your phone may get hard locked and sometimes become unusable.
1. Switch ON your Sidekick LX 2009 with a Not ACCEPTED SIM Card.
2. If your Sidekick LX 2009 asks for a PIN code, then enter your SIM card PIN and press OK.
3. Sidekick LX 2009 will ask to enter an "unlock code".
4. Enter Unlock Code we send to you.
5. Your Sidekick LX 2009 is now unlocked.

*NOT ACCEPTED : We mean, to use a Sim card from a network other than the network your Sidekick LX 2009 is locked to.
Each Sidekick LX 2009 mobile phone has an unique unlock code. You can buy the unique unlock code for your Sidekick LX 2009 mobile phone using the form above.

You can call T-Mobile and inform them that you want to use the phone in the UK on their system - with your T-Mobile SIM card and they will more than likely either unlock the phone or provide you the 'special' code to use it in the UK.

Your other alternative is to purchase an unlock code from eBay. The choice is really yours.

May i ask what it says when it asks for a code as it may be your sidekick is not unlocked at all. If it is however unlocked, and i appolagise if i am wrong, it may be asking you for a phone unlock code which the previous owner put on it. You would need to contact the previous owner for this code as the mobile phone provider will NOT reset it for anyone else as there will be a security question to answer before they will reset it!!

Hope this helps

Karlos

just ask the phone company provider for your PUK2 AND PUK codes.
when you get them go to the jump menu dial
**05*PUK*passcode*passcode#
the passcode is any 4-8 digits you'd like, that are NOT, AND I REPEAT N - O - T consecutive.
(for example 2736 is good whereas 1234 or 9876 is bad)
if it asks your for the code again put in the PUK2 then go to settings> network options goto the "scan and select manually" button and chose your carrier.

I had the same problem with the sidekick i bought off of ebay , when you cal customer care just tell them you got it off ebay and you need the old users information deleted, they will give you step by step instructions on how to do so. Remember to not call on your sidekick becasue you will have to restart the phone.

i have to put a code so i can activate the sim card..but i dont now who to pu it and what code i have to put so help me ..or send me a code

i need security code from side kick 3

works for sk 3, slide and lx.
the video says only at&t in the U.S. but... i've seen it work for fones in europe.
try it.