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The phone should not do this by default unless you are replying to multiple recipiants at the same time
How long are these messages,
Also when you type a message under the box you are typing in should be a line of text in grey that counts the charicters,
When I go over 160 on my 1020
it then reads 2 messages, xxx/306
do you see this
Then this is very odd
Can you check your firmware is upto date
Settings, system phone update check for updates
Can you also look at settings for your messages and confirm that all options bar the backup are set to off
Not really sure what is going on with your handset as the mrs's phone on voda correctly splits the message
One thing I did note is that you dont get the charicter count info until the message you are writing is over about 130 charicters sowe can rule out network settings
If you can draft a message of over this limit and take a screenshot it might help
Otherwise let someone at either a Vf store or CPWH repair centre take a look at it
It's the handset, not the network that controls this
being as we have established that
1) Voda's network does support splitting long texts into multiple messages
2) You did not source your handset direct from voda,
We can rule out voda as the source of the issue and have to either look at your handset or the way you are using it
Did you try just drafting a message over 130 or so charicters and seeing what your phone displays
Also wild idea but do you use emoticons or similar in your messages, not sure how the phone handles these
My Lumia 920 doesn’t convert texts to MMS.
All my messaging settings are set to off.
To check yours:
Have you had chance to try the factory reset to see if this solves the issue?
You are sending MMS messages from your handset and being charged as such.
Voda will and can only accept responsibility for handsets provded directly by them
As carphone warehouse doesn't source it's handsets from Voda, voda are not responsible for the handset misbehaving.
Anyone can offer suggestions on this forum, but it's a bit of a puzzler, as to what's going on with your handset
Another thought is can you confirm the sms centre number (settings / messaging)