Text messages being sent twice

I get this behaviour in email clients from time to time as well. It's usually due to updating the client (email, messages, messenger, text, whatever) to the latest version. Various folks like MS and Google and others seem to think we all want our communications 'grouped' in some fashion, so every time they update, they give you their preferred setting, and you need to turn it off again. The setting is just a view (sometimes called a thread) of conversations between you and others. I prefer my texts grouped just by recipient/sender and chronologically.
If your phone was used to forward your texts to someone else they should show up in the 'sent' side of the list, or in your 'recent' messages. Unless they deleted them as they sent them.
I'd lean to app misbehaviour before conspiracy... and if you have texts you don't want seen, put a lock on the phone, delete messages as you send them, or don't send them in the first place ;-)

Once a text message is sent, it's sent. There is no way to stop the send or delete the message.

This model not the best for doing & receiving pictures or texts. But I sometimes have issue above if someone has sent a message or a picture to me as part of a group message. I seem to have less issues if they send it to just me directly. Next time someone sends you one, text them back & ask them to send you pic/message seperately, not within a group & see if that helps

save sent messages , check your msg center number

I was having this very same problem with my brand new Propel. It seems that the longer the message is, the phone will split it into multiple messages, because it starts at 1 and as I continue typing it increments the number of messages to be sent. If I delete some characters, then the number of messages goes down. I seems like it allows about 160 characters per message.

What I'm still confused about it why it is driving your friends crazy. Are they getting the full message multiple times? I would think they would get multiple messages with a portion of your message in each. Are they getting the messages out of order?

Do you have the message center number that it's sent through.. Go to menu, messages, settings, and text message and see if this number works. +13123149810

I had the same problem with my new Blackjack 2, I could receive txts, but my friends would not receive the ones I sent. To fix it, I put a + in front of the number. and added the 1 before the area code. so their numbers looked like this +1(areacode)number. now they get them. Others had to do a hard reset of their Blackjacks, but it worked.

if its a new phone / sim then you might need sms / wap settings sent from your service provider to set the sms message centre number in your phone etc.

Alternatively some SP's require you to call them and register a payg phone to enable full functionality, call your customer service line and explain, they will fix it right away.

talk to your tech, at the service provider keosk, you may be having problems with internet access.

It's a operator message. Your SIM card need to send a message to the operator to inform something about your phone (like you are using a new phone) but the receiver don't recognize for what the message is. Your sim card will keep sending the message until it receives a valid response.
Try to change the SIM card and see what happens. If the problem appears only with one card, you may ask your carrier company to change it.