The features
of our SMS sending services

A set of practical sheets to discover and master all the features of creating and optimizing your SMS campaigns.

Accepted GSM characters

FOR SENDING SMS

You will find below all the characters supported by telecom operators and in particular our smsmode© message sending solution. The character restrictions do not come from our service but from the harmonisation of the GSM standard to make the SMS or Text Message service in English universal. Other types of limits may exist depending on the operator and the equipment used by your recipient.

How many characters for my SMS?

The size of your text, i.e. the number of characters in your message, depends on the encoding of your text message chosen when you send SMS messages:

  • SMS in normal ISO-8859-15 encoding: 160 characters maximum per SMS, then automatic concatenation of the text on the user's device up to 5 concatenated SMS,
  • Unicode SMS: 70 characters maximum, the cost of 1 SMS sent per recipient every 70 characters and this allows to manage all Unicode characters, including emoticons.

 

What are the specificities for "special" characters?
  • The following characters count as double characters when calculating the size of your text:
    { } € [ ] ~ ^ ¨ | €
    For more details, we invite you to consult the table below.
  • There are also "substitutable" characters, such as ç, ê, ë or ô, which are non-existent in GSM characters.
    Unless you do otherwise or send them in Unicode encoding, they will automatically be replaced in your SMS sending.
  • If you specify a character that is not present in the list, it will be replaced by"?".

GOOD PRACTICE

Before sending a massive SMS campaign through our API or Customer Centre (HMI) solutions, we advise you to always send a test SMS so that you can validate the encoding of your text message and check that the special characters are identical to your initial request.

LIST OF
GSM CHARACTERS AND THEIR ENCODING

 

CHARACTERISTICS ISO CODE 8859-15
New line %OA
Carriage return %OD
Space +
! %21
« %22
# %23
$ %24
% %25
& %26
%27
( %28
) %29
* *
+ %2B
, %2C
. .
/ %2F
{ %7B*
| %7C*
} %7D*
~ %7E*
[ %5B*
\ %5C*
] %5D*
^ %5E*
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
: %3A
; %3B
< %3C
= %3D
%3E
? %3F
@ %40

 

CHARACTERISTICS ISO CODE 8859-15
A A
B B
C C
D D
E E
F F
G G
H H
I I
J J
K K
L L
M M
N N
O O
P P
Q Q
R R
S S
T T
U U
V V
W W
X X
Y Y
Z Z
_ _
a a
b b
c c
d d
e e
f f
g g
h h
i i
j j
k k
l l
m m
n n
o o
p p

 

CHARACTERISTICS ISO CODE 8859-15
q q
r r
s s
t t
u u
v v
w w
x x
y y
z z
¡ %A1
£ %A3
%A4
¥ %A5
§ %A7
¿ %BF
Ä %C4
Å %C5
Æ %C6
Ç %C7
È %C8
É %C9
Ñ %D1
Ö %D6
Ø %D8
Ü %DC
ß %DF
à %E0
ä %E4
å %E5
æ %E6
è %E8
é %E9
ì %EC
ñ %F1
ò %F2
ö %F6
ø %F8
ù %F9
Ü %FC
%80*

* These characters count double.

REMINDER
WHAT IS THE GSM STANDARD?

The GSM (Global System for Mobile communication) standard is a standard for mobile telephony, including the sending of SMS (Short Message Service). It is used all over the world to manage the different encodings. Of European origin, this standard has conquered the world with its performance. It was created to manage the multiplicity of mobile devices that can receive calls and SMS. The emergence and disappearance of telephone operators, the arrival of new digital and analogue transmission techniques require compliance with a standard where characters are encoded in GSM-7. This encoding makes communication between several terminals universal.

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