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It is likely that the phone has 'dropped off the network' or your message centre number has been accidentally changed.
The phone periodically sends a signal to the network to keep the network updated with its location. That way, when a call or text is made to your phone, the network knows which CELL to send the signal to (the last CELL place the phone was found in). If the network has not received a signal from the phone saying it is being turned off or has not managed to keep the network updated, the network will not deliver a text although this should not affect sending texts (in theory).
To get it working again, there are a few things to try:
1. Remove the battery without turning the phone off, remove the SIM and power up the phone. When the phone has started, turn it off, re-insert the SIM and start the phone.
2. Go into Network Settings and manually try to connect to another network and when it fails, set it back to automatic.
3. Temporarily put your SIM into another phone for a minute (you could get lots of texts coming in so read them before you put the SIM back into your phone.
Go to 'Menu > Settings > Wireless & networks > Mobile networks' and make sure 'Use packet data' is checked. Then tap 'Access point names', and make sure your carrier's data plan name is already shown there. Otherwise, i.e. if there is no data plan shown at all, tap 'Menu > New APN', and fill in the required data: Name: AIRCEL; APN: aircelgprs; Username: [blank]; Password: [blank]. Then, press 'Menu > Save', press the back button as many times as you want to take you to where you were prior you started changing these settings. Hope it works for you. Anyway, please, let me know if you need further informations. Regards,Carlos
The best way to unlock your Blackberryis to buy unlock codes from a trusted vendor.
Search internet for mobile phone unlocking websites. You will come
across a thousand websites who can do this. Choose which ever you like.
Do look for price comparisons and the unlocking instructions.
Recheck the Model number- Network to which your phone is locked to and
the IMEI number before placing an order. If you made any mistakes in
these details these people will never give you a refund!!
One more thing, before placing an order ask them about the conditions
for getting a full refund in the case of a code failure! Think and make a
wise decision. I have personally bought the code for my Blackberry Storm from unlockgenie.com.
It is because they have good reviews on most of the mobile phone
forums. I got my phone unlocked successfully from that website. I think
their codes don't fail. The web link for the above mentioned web site
Network provider sometimes caused this problem because of their system mulfunction or upgrade. With that sometimes we can call but texting unable to send or received, but sometimes a signal indicator is full but not connected to the network provider, it means a feak signal. My recomendation is to contact network provider hotline and tell your problem or replace simcard. If yuo totally cannot call and text then positive your fone has a signal problem and need repair on it. Good luck