diff --git a/telephony/java/android/telephony/SmsMessage.java b/telephony/java/android/telephony/SmsMessage.java
index f9b95b2..b60da5a 100644
--- a/telephony/java/android/telephony/SmsMessage.java
+++ b/telephony/java/android/telephony/SmsMessage.java
@@ -224,25 +224,29 @@
 
     /**
      * Calculates the number of SMS's required to encode the message body and
-     * the number of characters remaining until the next message, given the
-     * current encoding.
+     * the number of characters remaining until the next message.
      *
-     * @param messageBody the message to encode
-     * @param use7bitOnly if true, characters that are not part of the GSM
-     *         alphabet are counted as a single space char.  If false, a
-     *         messageBody containing non-GSM alphabet characters is calculated
-     *         for 16-bit encoding.
+     * @param msgBody the message to encode
+     * @param use7bitOnly if true, characters that are not part of the
+     *         radio-specific 7-bit encoding are counted as single
+     *         space chars.  If false, and if the messageBody contains
+     *         non-7-bit encodable characters, length is calculated
+     *         using a 16-bit encoding.
      * @return an int[4] with int[0] being the number of SMS's required, int[1]
      *         the number of code units used, and int[2] is the number of code
      *         units remaining until the next message. int[3] is the encoding
      *         type that should be used for the message.
      */
-    public static int[] calculateLength(CharSequence messageBody, boolean use7bitOnly) {
+    public static int[] calculateLength(CharSequence msgBody, boolean use7bitOnly) {
+        int activePhone = TelephonyManager.getDefault().getPhoneType();
         int ret[] = new int[4];
 
-        try {
-            // Try GSM alphabet
-            int septets = GsmAlphabet.countGsmSeptets(messageBody, !use7bitOnly);
+        int septets = (PHONE_TYPE_CDMA == activePhone) ?
+                com.android.internal.telephony.cdma.SmsMessage.calc7bitEncodedLength(msgBody,
+                        use7bitOnly) :
+                com.android.internal.telephony.gsm.SmsMessage.calc7bitEncodedLength(msgBody,
+                        use7bitOnly);
+        if (septets != -1) {
             ret[1] = septets;
             if (septets > MAX_USER_DATA_SEPTETS) {
                 ret[0] = (septets / MAX_USER_DATA_SEPTETS_WITH_HEADER) + 1;
@@ -253,12 +257,10 @@
                 ret[2] = MAX_USER_DATA_SEPTETS - septets;
             }
             ret[3] = ENCODING_7BIT;
-        } catch (EncodeException ex) {
-            // fall back to UCS-2
-            int octets = messageBody.length() * 2;
-            ret[1] = messageBody.length();
+        } else {
+            int octets = msgBody.length() * 2;
+            ret[1] = msgBody.length();
             if (octets > MAX_USER_DATA_BYTES) {
-                // 6 is the size of the user data header
                 ret[0] = (octets / MAX_USER_DATA_BYTES_WITH_HEADER) + 1;
                 ret[2] = (MAX_USER_DATA_BYTES_WITH_HEADER
                             - (octets % MAX_USER_DATA_BYTES_WITH_HEADER))/2;
diff --git a/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java b/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java
index 9152559..bbdd0dd 100644
--- a/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java
+++ b/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java
@@ -357,6 +357,17 @@
     }
 
     /**
+     * Calculate the number of septets needed to encode the message.
+     *
+     * @param messageBody the message to encode
+     * @param force ignore (but still count) illegal characters if true
+     * @return septet count, or -1 on failure
+     */
+    public static int calc7bitEncodedLength(CharSequence msgBody, boolean force) {
+        return BearerData.calc7bitEncodedLength(msgBody.toString(), force);
+    }
+
+    /**
      * Note: This function is a GSM specific functionality which is not supported in CDMA mode.
      */
     public int getProtocolIdentifier() {
diff --git a/telephony/java/com/android/internal/telephony/cdma/sms/BearerData.java b/telephony/java/com/android/internal/telephony/cdma/sms/BearerData.java
index ab65b0a..3c45aa4 100644
--- a/telephony/java/com/android/internal/telephony/cdma/sms/BearerData.java
+++ b/telephony/java/com/android/internal/telephony/cdma/sms/BearerData.java
@@ -385,7 +385,17 @@
         outStream.skip(3);
     }
 
-    private static byte[] encode7bitAscii(String msg)
+    private static class SeptetData {
+        byte data[];
+        int septetCount;
+
+        SeptetData(byte[] data, int septetCount) {
+            this.data = data;
+            this.septetCount = septetCount;
+        }
+    }
+
+    private static SeptetData encode7bitAscii(String msg, boolean force)
         throws CodingException
     {
         try {
@@ -396,23 +406,43 @@
                 // Test ourselves for ASCII membership, since Java seems not to care.
                 if ((charCode < UserData.PRINTABLE_ASCII_MIN_INDEX) ||
                         (charCode > UserData.PRINTABLE_ASCII_MAX_INDEX)) {
-                    throw new CodingException("illegal ASCII code (" + charCode + ")");
+                    if (force) {
+                        outStream.write(7, UserData.UNENCODABLE_7_BIT_CHAR);
+                    } else {
+                        throw new CodingException("illegal ASCII code (" + charCode + ")");
+                    }
+                } else {
+                    outStream.write(7, expandedData[i]);
                 }
-                outStream.write(7, expandedData[i]);
             }
-            return outStream.toByteArray();
-        } catch  (java.io.UnsupportedEncodingException ex) {
+            return new SeptetData(outStream.toByteArray(), expandedData.length);
+        } catch (java.io.UnsupportedEncodingException ex) {
             throw new CodingException("7bit ASCII encode failed: " + ex);
-        } catch  (BitwiseOutputStream.AccessException ex) {
+        } catch (BitwiseOutputStream.AccessException ex) {
             throw new CodingException("7bit ASCII encode failed: " + ex);
         }
     }
 
+    /**
+     * Calculate the number of septets needed to encode the message.
+     *
+     * @param force ignore (but still count) illegal characters if true
+     * @return septet count, or -1 on failure
+     */
+    public static int calc7bitEncodedLength(String msg, boolean force) {
+        try {
+            SeptetData data = encode7bitAscii(msg, force);
+            return data.septetCount;
+        } catch (CodingException ex) {
+            return -1;
+        }
+    }
+
     private static byte[] encodeUtf16(String msg)
         throws CodingException
     {
         try {
-            return msg.getBytes("utf-16be"); // XXX(do not submit) -- make sure decode matches
+            return msg.getBytes("utf-16be");
         } catch (java.io.UnsupportedEncodingException ex) {
             throw new CodingException("UTF-16 encode failed: " + ex);
         }
@@ -462,7 +492,8 @@
                 if (uData.msgEncoding == UserData.ENCODING_GSM_7BIT_ALPHABET) {
                     payloadData = encode7bitGsm(uData.payloadStr);
                 } else if (uData.msgEncoding == UserData.ENCODING_7BIT_ASCII) {
-                    payloadData = encode7bitAscii(uData.payloadStr);
+                    SeptetData septetData = encode7bitAscii(uData.payloadStr, true);
+                    payloadData = septetData.data;
                 } else if (uData.msgEncoding == UserData.ENCODING_UNICODE_16) {
                     payloadData = encodeUtf16(uData.payloadStr);
                 } else {
@@ -478,7 +509,8 @@
                 uData.payloadStr = "";
             }
             try {
-                payloadData = encode7bitAscii(uData.payloadStr);
+                SeptetData septetData = encode7bitAscii(uData.payloadStr, false);
+                payloadData = septetData.data;
                 uData.msgEncoding = UserData.ENCODING_7BIT_ASCII;
             } catch (CodingException ex) {
                 payloadData = encodeUtf16(uData.payloadStr);
diff --git a/telephony/java/com/android/internal/telephony/cdma/sms/UserData.java b/telephony/java/com/android/internal/telephony/cdma/sms/UserData.java
index 7c37bc2..8d4e769 100644
--- a/telephony/java/com/android/internal/telephony/cdma/sms/UserData.java
+++ b/telephony/java/com/android/internal/telephony/cdma/sms/UserData.java
@@ -50,6 +50,14 @@
         'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '{', '|', '}', '~'};
 
     /**
+     * Character to use when forced to encode otherwise unencodable
+     * characters, meaning those not in the respective ASCII or GSM
+     * 7-bit encoding tables.  Current choice is SPACE, which is 0x20
+     * in both the GSM-7bit and ASCII-7bit encodings.
+     */
+    static final byte UNENCODABLE_7_BIT_CHAR = 0x20;
+
+    /**
      * Only elements between these indices in the ASCII table are printable.
      */
     public static final int PRINTABLE_ASCII_MIN_INDEX = 0x20;
diff --git a/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java b/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
index 6435be5..a15bbdf 100644
--- a/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
+++ b/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
@@ -739,6 +739,22 @@
         }
     }
 
+    /**
+     * Calculate the number of septets needed to encode the message.
+     *
+     * @param messageBody the message to encode
+     * @param force ignore (but still count) illegal characters if true
+     * @return septet count, or -1 on failure
+     */
+    public static int calc7bitEncodedLength(CharSequence messageBody, boolean force) {
+        try {
+            return GsmAlphabet.countGsmSeptets(messageBody, !force);
+        } catch (EncodeException ex) {
+            /* Just fall through to the -1 error result below. */
+        }
+        return -1;
+    }
+
     /** {@inheritDoc} */
     public int getProtocolIdentifier() {
         return protocolIdentifier;