山西：电子税务局操作时，提示“当前经办人手机号码为空”怎么办？操作步骤

Group 1 - The article provides a step-by-step guide for taxpayers who encounter an issue with their mobile number being empty when trying to report cross-regional matters [2][3] - Taxpayers are instructed to access the electronic tax bureau without logging in and click on the "Retrieve Mobile Number" option [3][7] - The process involves entering identification type, identification number, personal login password, and setting a new mobile number, followed by verification through facial recognition [6][10] Group 2 - The article emphasizes the importance of completing the identity verification process to successfully retrieve the mobile number [10] - Taxpayers can also utilize the electronic tax bureau APP for the same retrieval process, ensuring accessibility [6][8] - The article encourages taxpayers to use online services for tax-related inquiries and assistance, highlighting the availability of remote support through the "Yueyue" service [26][27]