SMS - 30 Character Limit

[KFM]

Hi, I'm a little confused with the character limit on SMSs. I'm only able to send SMSs with only 30 characters, anything more and it just won't send, and gives a "Couldn't send message" error.

I have tried with different phones and tried changing some relevant settings etc., but nothing seems to make the SMSs work with the usual 160 character limit.

Has anyone on this community had this or similar issue? If so, any steps to resolve would be appreciated.

Thanks.

[Cleoriff]

@KFM 

The only info we have on SMS and MMS is here

Guide: Accidental MMS Sending and How to Avoid it 

[KFM]

Thanks for responding, @Cleoriff - unfortunately, that guide does not have any information pertaining to the issue I've got.

[Enlli]

Have you tried a different messaging app? 

[japitts]

What phone are you using, and is this on the stock text messaging app?

[KFM]

Yes, for example WhatsApp works perfectly fine.

[KFM]

I've tried my O2 sim in Samsung A21S, Note 20 Ultra and Note 9, and yes the stock text messaging app is the one which has this issue.

[KFM]

I actually thought it was the phone, that's why I tried different phones - the 30-character limit is across all the phones I've tried - which led me believe that it's something to do with the O2 sim rather than the handset in use.

It's weird to think that a sim would impose such a limit though.

[Enlli]

If using Samsung Messages try Messages from Google

Or Vice Versa 

[KFM]

Thanks @Enlli - I was using Samsung Messages, but as per your suggestion, I just tried Google Messages now, and it's got the same 30-character limit, 31 or more it wouldn't send the message.

It was a good shout though, because Google Messages shows a more descriptive error i.e., "Can't send message with O2 - error 0", which actually directly points to a problem with O2.

It is, however, weird still that I've got another O2 sim on exactly the same monthly contract, and that doesn't seem to have this issue.