BY VISITING TIMELINE

This question is frequently asked and many people are very interested in knowing about the person who have not yet responded to their friend requests and those who have un friended them..so first here i elaborate how u can know it by visiting their timeline (specially for those who are new to facebook):-

https://www.facebook.com/Callertunes4u

1. If you see Add as Friend, then you don't have a friend request pending.
2. If you see Awaiting friend confirmation, you'll know that you've sent a request that hasn't yet been confirmed.
3. If you see the Remove friend link, you'll know you've both confirmed your friendship

https://www.facebook.com/Callertunes4u

The growth of facebook even surprised the founder Mark Zuckerburg. We know, facebook has become one of our favourite place to share and display our ideas. But the real facts behind this success social networking site is really amazing. According to Popular Identity Survey, Fb is the second largest by population. 6 out of 10 of youth are member in facebook. Lets see the top10 facts behind the working of facebook.

https://www.facebook.com/Callertunes4u

•                 *#06# – Displays IMEI

•                  *3001#12345#* + “Call” – Accesses a hidden Field Test menu

•                  *#43# + “Call” – Displays call waiting status

•                 *43# + “Call” – Enables call waiting

•                  #43# + “Call” – Disables call waiting

•                 *#21# – Displays call forwarding status

•                 ##002# + “Call” – Disables all call forwarding

•                  *33*pin# – Enables call barring

•                 #33*pin# – Disables call barring

•                  #31#phone-number + “Call” – Blocks caller ID for the current phone call

•                  *3370# + “Call” – Enables “Enhanced Full Rate” and improves voice quality on GSM          networks (may impact battery life)

•                 *#5005*7672# + “Call” – Displays your carrier’s message center phone number 

•                 *#*#4636#*#* – Accesses a hidden test menu with sections for network, battery information and usage stats. Under the “About phone” option in Settings, tap “Build number” seven times – this will enable a new “Developer options” menu in Settings that gives you access to a treasure trove of functions

• Balance Check :    *141#
• V2V Nite Minutes :   *147#
• Check SIM Card Number :   *111*2#
• Free SMS Balance :   *142#
• Calling Balance :    *145#
• Free Local Minutes :   *148#
• Active Data Plans :   *111*6*1#
• Usage Allowance :   *111*6*2#
• Best Offers :   *111*8#
• Offers :   *121#
• Low Balance Services :   *111*9#
• Bonus Cards :    *111*7*#
• Vodafone Delights :   *111*1#
• Last Three Calls :    *111*3*1#
• Last Three SMS :    *111*3*2#
• Last 3 Charges :       *111*4#
• Last 3 Recharges :    *111*5#