How can I send & receive calls on my new Samsung Sm250G

You can check settings for your messages,see what you have selected.

if it is not brand new the main opperator orange can block it

Try www.manualowl.com

Answering a call:

When a call is received the phone rings and displays the caller's
phone number, or name if stored in the Address Book.
1. At the incoming call screen:
• Touch and slide to the right to answer the call.
• Touch and slide to the left to reject the call and send it to
your voicemail.
• Touch and slide the Reject call with message tab upward and tap
a predefined text message to send to the caller.
- I'm driving
- In a cinema
- I'm in class now
- I'm in a meeting
- Sorry, I'll call later
- or -
- Tap Create new message to compose a new message.

You may also click on this link to download the user manual for complete instructions with photos:

http://www.samsung.com/us/support/downloads/SGH-I897ZKAATT

Note:
"Answering a Call" portions is on Page 46

hi dear friend YOU ONLY SEND AND RECEIVE TEXT MESSAGES OK. contact your vendar for mms messages.

call or bring it to the store where you buy your service provider to reactivate your plan.

Your phone might not support blue tooth file transfer. Call your service provider and ask, they should be able to tell you. Also the file you are trying to receive/send might be to big

ok the only thing i could say is to turn off the phone and remove the battery for about half a minute this would fix the problem hopefully. or try calling your service provider. I have telus and when that happened to me with the same phone i called them and they reset my network. they might have a problem doing this, so the easiest way to get your network reset for your phone is to tell them that you forgot your voicemail pin. when they reset your voicemail password they reset your network at the same time. hopefully this is answer your questions and get your sons cell working again.

contact you network operator for the message centre number, once youve got it goto message settings and insert the number into the message centre number menu, save it and ten you can send messages

you can call tmobile and just let them know ur problem...what they will do is send you something through a text message and once u open it...it automatically changes some settings so that ur phone can send and receive picture messages