Pick (or Diag Mode if working on advanced smartphone configurations) and click Select to lock in the communication method.
Since this is a niche technical utility, it isn't hosted on a single official "store" but on various developer forums and mobile repair archives. You can typically find downloads on sites such as: RepairMyMobile write imei tool r300001 updated
: Locate the original 15-digit IMEI number on the phone’s retail box, original receipt, or the sticker under the battery. Pick (or Diag Mode if working on advanced