It seems this is a problem with the SMSC, but I cannot solve it. I can only send SMS that are not bigger than 1 or 2 sms together, if I try 3 or 4, it doesn't send.
My cell's network is Vodafone, I'm in Portugal and this is the SMSC number I should be using:
The +351 is the country code.
I tried to use the *#*#4636#*#* code in order to change it.
I click "refresh", then "update". I click back, go there again and it's blank. Also tried to use other SMS app, still doesn't send big sms.
Thanks in advance.