Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Personal Unblocking Code shopping experience:
1. Compare - without doubt the biggest advantage that the Personal Unblocking Code offers shoppers today is the ability to compare thousands of Personal Unblocking Code at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
3. Testimonials - don't know anybody that has bought a Personal Unblocking Code? Wrong! If the Personal Unblocking Code is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.
4. Questions - Got a question about Personal Unblocking Code then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Personal Unblocking Code? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Personal Unblocking Code and build up a picture of their reputation for sales, returns, customer service, delivery etc.
6. Returns - still worried that even after all of the above your Personal Unblocking Code wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.
7. Feedback - happy with your Personal Unblocking Code then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.
8. Security - check for the yellow padlock on the Personal Unblocking Code site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Personal Unblocking Code, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.
10. Payment - ready to pay for your Personal Unblocking Code, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.
For other meanings of the acronym 'PUC
, see the disambiguation page PUC.
A
Personal Unblocking Code (PUC) or
Personal Unblocking Key (PUK) is used in
GSM mobile phones and some
smartcards to unblock a blocked card.
Most mobile telephones offer the feature of
personal identification number (PIN) protection. After switching on the phone, the user, if the PIN security function is not switched off, is requested to enter a 4-8 digit PIN enabling the phone's non-emergency calling functions. If the wrong PIN is typed in more than three times, either the
SIM card, the device or both become locked. They can be reverted to their original unlocked state by entering a PUC, provided by the service operator through verification. If the wrong PUC is entered ten times in a row, the device will become permanently blocked and unrecoverable, requiring a new SIM card. Cellular phone users are therefore advised by most providers to keep their PUC written down in a safe place separate from the device.
References
- Antonio Savoldi & Paolo Gubian, "SIM and USIM filesystem: a forensics perspective" Proceedings of the 2007 ACM symposium on Applied computing (2007): 183. "CHV1: the command is executable on the file only if one among Card Holder Verification 1 code or Unblock Card Holder Verification 1 (called also PUK1, that is the Personal Unblocking Code 1) code has been successfully provided;" Similar remarks for CHV2.
External links
- Official 3GPP ETSI Specification of the Subscriber Identity Module - Mobile Equipment (SIM-ME) Interface:
For other meanings of the acronym 'PUC
, see the disambiguation page PUC.
A
Personal Unblocking Code (PUC) or
Personal Unblocking Key (PUK) is used in
GSM mobile phones and some smartcards to unblock a blocked card.
Most mobile telephones offer the feature of personal identification number (PIN) protection. After switching on the phone, the user, if the PIN security function is not switched off, is requested to enter a 4-8 digit PIN enabling the phone's non-emergency calling functions. If the wrong PIN is typed in more than three times, either the SIM card, the device or both become locked. They can be reverted to their original unlocked state by entering a PUC, provided by the service operator through verification. If the wrong PUC is entered ten times in a row, the device will become permanently blocked and unrecoverable, requiring a new SIM card. Cellular phone users are therefore advised by most providers to keep their PUC written down in a safe place separate from the device.
References
- Antonio Savoldi & Paolo Gubian, "SIM and USIM filesystem: a forensics perspective" Proceedings of the 2007 ACM symposium on Applied computing (2007): 183. "CHV1: the command is executable on the file only if one among Card Holder Verification 1 code or Unblock Card Holder Verification 1 (called also PUK1, that is the Personal Unblocking Code 1) code has been successfully provided;" Similar remarks for CHV2.
External links
- Official 3GPP ETSI Specification of the Subscriber Identity Module - Mobile Equipment (SIM-ME) Interface:
