How do I reset date and time. I have inserted my sim card but phone remains in "no sim mode".

Dial using the keypad: * # 0000 # - the version number displayed on the display.
V 5.16
22-06-99
NSM-1
V 5.16 - software version
22-06-99 - date
NSM-1 - The hardware (model)
View IMEI
Dial using the keypad: * # 06 # - IMEI number is displayed on the display.
SimClock
Allows you to check whether your SIM-card mode StopClock. When transferring the card to this mode significantly reduces power consumption and thus increases the work of the battery. Generally, all modern SIM-cards support this mode.
*#7780# reset to factory settings.
*#67705646# This will clear the LCD display (operator logo).
*#0000# To view software version.
*#2820# Blue tooth device address.
*#746025625# Sim clock allowed status.
*#62209526# - Display the MAC address of the WLAN adapter. This is available only in the newer devices that support WLAN
#pw+1234567890+1# Shows if sim have restrictions.
*#92702689# - takes you to a secret menu where you may find some of the information below:
1. Displays Serial Number.
2. Displays the Month and Year of Manufacture
3. Displays (if there) the date where the phone was purchased (MMYY)
4. Displays the date of the last repair - if found (0000)
5. Shows life timer of phone (time passes since last start)
*#3370# - Enhanced Full Rate Codec (EFR) activation. Increase signal strength, better signal reception. It also help if u want to use GPRS and the service is not responding or too slow. Phone battery will drain faster though.
*#3370* - (EFR) deactivation. Phone will automatically restart. Increase battery life by 30% because phone receives less signal from network.
*#4720# - Half Rate Code activation.
*#4720* - Half Rate Code deactivation. The phone will automatically restart
If you forgot wallet code for Nokia S60 phone, use this code reset: *#7370925538#
Note, your data in the wallet will be erased. Phone will ask you the lock code. Default lock code is: 12345
Press *#3925538# to delete the contents and code of wallet.
Unlock service provider: Insert sim, turn phone on and press vol up(arrow keys) for 3 seconds, should say pin code. Press C,then press * message should flash, press * again and 04*pin*pin*pin#
*#7328748263373738# resets security code.
Default security code is 12345
SIM Clock
Stop allowed
Warranty Codes
* # 92702689 # [* # war0anty #]

you can remove your simcard, clean it ,and insert it back where it was , then you can restart your phone, it worked for me!

It may be due to network lock,
you can check it with other sim card ,if it remains the same problem ,it may be locked to particular network wont accept any sim card other than the particular network ,you can unlock it and used to other network,try here
http://www.theunlockarena.com/sony-ericsson-aino/rs13wp9/

reset the phone usually that will do the trick. If not he sim may have gone bad and you will have to get a replacement from your service provider

TRY OTHER SIM,IF IT DOESN'T WORK , THE BEST WAY IS RESET YOUR PHONE, IT WILL SURE SOLVE YOUR PROBLEM,

you can check it with other sim card ,if it remains the same problem ,it may be locked to particular network wont accept any sim card other than the particular network ,you can unlock it and used to other network,try here http://www.prounlocking.com/samsung-a707/rs8wp9/

do check your sim card that it is properly inserted or not...sometimes the sim card not properly inserted so the mode can'nt be changed

have you try turning the flight mode off on the phone setting