I have an Orange SF 2.1. Yesterday someone sent me a text but when I tried to reply - several times - my reply wouldn't send. 
I tried texting my husband - several times - and another friend and still the text wouldn't go!
My husband texted me and the message appeared straightaway.
Checking the Orange site for a solution they say to check the Service Centre number, but it's still there and it's the correct number.
Don't know whether it's the network causing this problem, but it's annoying.
Is there anything else I could check?

I tried texting my husband - several times - and another friend and still the text wouldn't go!

Checking the Orange site for a solution they say to check the Service Centre number, but it's still there and it's the correct number.
Don't know whether it's the network causing this problem, but it's annoying.

Is there anything else I could check?