Not all keyboard based characters are supported by the mobile networks’ protocol for SMS, so here is a list of the GSM alphabet characters which are supported.
GSM stands for Global System for Mobile Communications, and refers to the most frequently used alphabet used to write text messages.
As a general rule if you send an unsupported character, it will appear on a handset as the Latin character without the accent; so á will appear as a.
| Character Name | Character | Cost |
| LATIN SMALL LETTER A | a | 1 Character |
| LATIN SMALL LETTER B | b | 1 Character |
| LATIN SMALL LETTER C | c | 1 Character |
| LATIN SMALL LETTER D | d | 1 Character |
| LATIN SMALL LETTER E | e | 1 Character |
| LATIN SMALL LETTER F | f | 1 Character |
| LATIN SMALL LETTER G | g | 1 Character |
| LATIN SMALL LETTER H | h | 1 Character |
| LATIN SMALL LETTER I | i | 1 Character |
| LATIN SMALL LETTER J | j | 1 Character |
| LATIN SMALL LETTER K | k | 1 Character |
| LATIN SMALL LETTER L | l | 1 Character |
| LATIN SMALL LETTER M | m | 1 Character |
| LATIN SMALL LETTER N | n | 1 Character |
| LATIN SMALL LETTER O | o | 1 Character |
| LATIN SMALL LETTER P | p | 1 Character |
| LATIN SMALL LETTER Q | q | 1 Character |
| LATIN SMALL LETTER R | r | 1 Character |
| LATIN SMALL LETTER S | s | 1 Character |
| LATIN SMALL LETTER T | t | 1 Character |
| LATIN SMALL LETTER U | u | 1 Character |
| LATIN SMALL LETTER V | v | 1 Character |
| LATIN SMALL LETTER W | w | 1 Character |
| LATIN SMALL LETTER X | x | 1 Character |
| LATIN SMALL LETTER Y | y | 1 Character |
| LATIN SMALL LETTER Z | z | 1 Character |
| LATIN SMALL LETTER A WITH DIAERESIS | ä | 1 Character |
| LATIN SMALL LETTER O WITH DIAERESIS | ö | 1 Character |
| LATIN SMALL LETTER N WITH TILDE | ñ | 1 Character |
| LATIN SMALL LETTER U WITH DIAERESIS | ü | 1 Character |
| LATIN SMALL LETTER A WITH GRAVE | à | 1 Character |
| LATIN SMALL LETTER E WITH GRAVE | è | 1 Character |
| LATIN SMALL LETTER E WITH ACUTE | é | 1 Character |
| LATIN SMALL LETTER U WITH GRAVE | ù | 1 Character |
| LATIN SMALL LETTER I WITH GRAVE | ì | 1 Character |
| LATIN SMALL LETTER O WITH GRAVE | ò | 1 Character |
| LATIN CAPITAL LETTER A | A | 1 Character |
| LATIN CAPITAL LETTER B | B | 1 Character |
| LATIN CAPITAL LETTER C | C | 1 Character |
| LATIN CAPITAL LETTER D | D | 1 Character |
| LATIN CAPITAL LETTER E | E | 1 Character |
| LATIN CAPITAL LETTER F | F | 1 Character |
| LATIN CAPITAL LETTER G | G | 1 Character |
| LATIN CAPITAL LETTER H | H | 1 Character |
| LATIN CAPITAL LETTER I | I | 1 Character |
| LATIN CAPITAL LETTER J | J | 1 Character |
| LATIN CAPITAL LETTER K | K | 1 Character |
| LATIN CAPITAL LETTER L | L | 1 Character |
| LATIN CAPITAL LETTER M | M | 1 Character |
| LATIN CAPITAL LETTER N | N | 1 Character |
| LATIN CAPITAL LETTER O | O | 1 Character |
| LATIN CAPITAL LETTER P | P | 1 Character |
| LATIN CAPITAL LETTER Q | Q | 1 Character |
| LATIN CAPITAL LETTER R | R | 1 Character |
| LATIN CAPITAL LETTER S | S | 1 Character |
| LATIN CAPITAL LETTER T | T | 1 Character |
| LATIN CAPITAL LETTER U | U | 1 Character |
| LATIN CAPITAL LETTER V | V | 1 Character |
| LATIN CAPITAL LETTER W | W | 1 Character |
| LATIN CAPITAL LETTER X | X | 1 Character |
| LATIN CAPITAL LETTER Y | Y | 1 Character |
| LATIN CAPITAL LETTER Z | Z | 1 Character |
| LATIN CAPITAL LETTER A WITH DIAERESIS | Ä | 1 Character |
| LATIN CAPITAL LETTER O WITH DIAERESIS | Ö | 1 Character |
| LATIN CAPITAL LETTER N WITH TILDE | Ñ | 1 Character |
| LATIN CAPITAL LETTER U WITH DIAERESIS | Ü | 1 Character |
| DIGIT ZERO | 0 | 1 Character |
| DIGIT ONE | 1 | 1 Character |
| DIGIT TWO | 2 | 1 Character |
| DIGIT THREE | 3 | 1 Character |
| DIGIT FOUR | 4 | 1 Character |
| DIGIT FIVE | 5 | 1 Character |
| DIGIT SIX | 6 | 1 Character |
| DIGIT SEVEN | 7 | 1 Character |
| DIGIT EIGHT | 8 | 1 Character |
| DIGIT NINE | 9 | 1 Character |
| SPACE | 1 Character | |
| LINE FEED | 1 Character | |
| CARRIAGE RETURN | 1 Character | |
| EXCLAMATION MARK | ! | 1 Character |
| QUOTATION MARK | “ | 1 Character |
| NUMBER SIGN | # | 1 Character |
| CURRENCY SIGN | ¤ | 1 Character |
| PERCENT SIGN | % | 1 Character |
| AMPERSAND | & | 1 Character |
| APOSTROPHE | ‘ | 1 Character |
| LEFT PARENTHESIS | ( | 1 Character |
| RIGHT PARENTHESIS | ) | 1 Character |
| ASTERISK | * | 1 Character |
| PLUS SIGN | + | 1 Character |
| COMMA | , | 1 Character |
| LOW LINE | _ | 1 Character |
| HYPHEN-MINUS | – | 1 Character |
| FULL STOP | . | 1 Character |
| SOLIDUS (SLASH) | / | 1 Character |
| COLON | : | 1 Character |
| SEMICOLON | ; | 1 Character |
| LESS-THAN SIGN | < | 1 Character |
| EQUALS SIGN | = | 1 Character |
| GREATER-THAN SIGN | > | 1 Character |
| QUESTION MARK | ? | 1 Character |
| INVERTED EXCLAMATION MARK | ¡ | 1 Character |
| SECTION SIGN | § | 1 Character |
| INVERTED QUESTION MARK | ¿ | 1 Character |
| COMMERCIAL AT | @ | 1 Character |
| POUND SIGN | £ | 1 Character |
| DOLLAR SIGN | $ | 1 Character |
| YEN SIGN | ¥ | 1 Character |
| LATIN CAPITAL LETTER C WITH CEDILLA | Ç | 1 Character |
| LATIN CAPITAL LETTER O WITH STROKE | Ø | 1 Character |
| LATIN SMALL LETTER O WITH STROKE | ø | 1 Character |
| LATIN CAPITAL LETTER A WITH RING ABOVE | Å | 1 Character |
| LATIN SMALL LETTER A WITH RING ABOVE | å | 1 Character |
| GREEK CAPITAL LETTER DELTA | Δ | 1 Character |
| GREEK CAPITAL LETTER PHI | Φ | 1 Character |
| GREEK CAPITAL LETTER GAMMA | Γ | 1 Character |
| GREEK CAPITAL LETTER LAMBDA | Λ | 1 Character |
| GREEK CAPITAL LETTER OMEGA | Ω | 1 Character |
| GREEK CAPITAL LETTER PI | Π | 1 Character |
| GREEK CAPITAL LETTER PSI | Ψ | 1 Character |
| GREEK CAPITAL LETTER SIGMA | Σ | 1 Character |
| GREEK CAPITAL LETTER THETA | Θ | 1 Character |
| GREEK CAPITAL LETTER XI | Ξ | 1 Character |
| LATIN CAPITAL LETTER AE | Æ | 1 Character |
| LATIN SMALL LETTER AE | æ | 1 Character |
| LATIN SMALL LETTER SHARP S (German) | ß | 1 Character |
| LATIN CAPITAL LETTER E WITH ACUTE | É | 1 Character |
| FORM FEED | 2 Characters | |
| CIRCUMFLEX ACCENT | ^ | 2 Characters |
| LEFT CURLY BRACKET | { | 2 Characters |
| RIGHT CURLY BRACKET | } | 2 Characters |
| REVERSE SOLIDUS (BACKSLASH) | \ | 2 Characters |
| LEFT SQUARE BRACKET | [ | 2 Characters |
| TILDE | ~ | 2 Characters |
| RIGHT SQUARE BRACKET | ] | 2 Characters |
| VERTICAL BAR | | | 2 Characters |
| EURO SIGN | € | 2 Characters |
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