diff --git a/src/main/resources/templates/views/apps/mypage/components/commonUserInfo.html b/src/main/resources/templates/views/apps/mypage/components/commonUserInfo.html
index 92471d1..b68f388 100644
--- a/src/main/resources/templates/views/apps/mypage/components/commonUserInfo.html
+++ b/src/main/resources/templates/views/apps/mypage/components/commonUserInfo.html
@@ -26,24 +26,30 @@
         <div class="form-label-wrapper label-offset">
             <span class="form-label-text">휴대폰 번호</span> <span class="required-badge">필수</span>
         </div>
-        <div class="form-field-wrapper input-with-button" th:with="parts=${#strings.arraySplit(mobileNumber, '-')}">
+        <div class="form-field-wrapper input-with-button"
+             th:with="hasHyphen=${mobileNumber != null and #strings.contains(mobileNumber, '-')},
+                      parts=${hasHyphen ? #strings.arraySplit(mobileNumber, '-') : null},
+                      len=${mobileNumber != null ? #strings.length(mobileNumber) : 0},
+                      mobilePrefix=${hasHyphen ? (parts != null and #arrays.length(parts) > 0 ? parts[0] : '') : (len >= 3 ? #strings.substring(mobileNumber, 0, 3) : '')},
+                      mobileMiddle=${hasHyphen ? (parts != null and #arrays.length(parts) > 1 ? parts[1] : '') : (len == 11 ? #strings.substring(mobileNumber, 3, 7) : (len == 10 ? #strings.substring(mobileNumber, 3, 6) : ''))},
+                      mobileLast=${hasHyphen ? (parts != null and #arrays.length(parts) > 2 ? parts[2] : '') : (len == 11 ? #strings.substring(mobileNumber, 7, 11) : (len == 10 ? #strings.substring(mobileNumber, 6, 10) : ''))}">
             <div class="compound-input">
                 <input type="text"
-                       th:value="${parts != null and parts.length > 0 ? parts[0] : ''}"
+                       th:value="${mobilePrefix}"
                        name="mobilePrefix"
                        class="form-input input-readonly"
                        maxlength="3"
                        disabled="disabled">
                 <span class="separator">-</span>
                 <input type="text"
-                       th:value="${parts != null and parts.length > 1 ? parts[1] : ''}"
+                       th:value="${mobileMiddle}"
                        name="mobileMiddle"
                        class="form-input input-readonly"
                        maxlength="4"
                        disabled="disabled">
                 <span class="separator">-</span>
                 <input type="text"
-                       th:value="${parts != null and parts.length > 2 ? parts[2] : ''}"
+                       th:value="${mobileLast}"
                        name="mobileLast"
                        class="form-input input-readonly"
                        maxlength="4"
@@ -277,14 +283,17 @@
                         return;
                     }
 
-                    // 기존 휴대폰 번호 가져오기
+                    // 기존 휴대폰 번호 가져오기 (하이픈 없이)
                     const originalPrefix = document.querySelector('[name="mobilePrefix"]').value;
                     const originalMiddle = document.querySelector('[name="mobileMiddle"]').value;
                     const originalLast = document.querySelector('[name="mobileLast"]').value;
-                    const originalMobileNumber = `${originalPrefix}-${originalMiddle}-${originalLast}`;
+                    const originalMobileNumber = `${originalPrefix}${originalMiddle}${originalLast}`;
+
+                    // 새 번호에서도 하이픈 제거하여 비교
+                    const newMobileRaw = newMobileNumber.replace(/-/g, '');
 
                     // 동일한 번호인지 체크
-                    if (newMobileNumber === originalMobileNumber) {
+                    if (newMobileRaw === originalMobileNumber) {
                         customPopups.showAlert("동일한 휴대폰 번호입니다.");
                         return;
                     }