If a Nokia 6280 on 3 network is unlocked to use the O2 SIM while abroad can it be re-locked if you don't put the 3 SIM back?
When you have a phone unlocked it simply means that it will accept any sim card (any compatible sim card). So once its unlocked you dont have to worry about re-locking it. You can put your 3 sim card back in if you want, or an orange one or voda or keep the o2 one in. Its your choice.
The Nokia 6300 is available in 2 models and will influence the selling price of the phone. A Nokia 6300 Unlocked Cell Phone in Silver can be purchased new for $231 but can also be bought as used or refurbished, with a starting low price of $140 up to $180. The Nokia 6300 is also available as an Unlocked Triband Camera Business Phone. New pricing is from $199 to $234. Used pricing shows considerable savings…
Did you mean the network unlock ?.If it so means you can unlock your Nokia 3110c by the service from the provider http://www.wickedunlock.com/nokia-3110c/rs11wp9/ .Here they provide the unlock code along with instruction .To get the code you need to submit the country name,network provider name and IMEI number