diff --git a/README.md b/README.md
index a6e4a54..3d55261 100644
--- a/README.md
+++ b/README.md
@@ -243,7 +243,7 @@ const buffer = fs.readFileSync("Media/ma_gif.mp4") // load some gif
 const options: MessageOptions = {mimetype: Mimetype.gif, caption: "hello!"} // some metadata & caption
 conn.sendMessage(id, buffer, MessageType.video, options)
 // send an audio file
-const buffer = fs.readFileSync("Media/audio.mp3") // can send mp3, mp4, & ogg -- but for mp3 files the mimetype must be set to ogg
+const buffer = fs.readFileSync("Media/audio.mp3") // can send mp3, mp4, & ogg
 const options: MessageOptions = {mimetype: Mimetype.mp4Audio} // some metadata (can't have caption in audio)
 conn.sendMessage(id, buffer, MessageType.audio, options)
 ```
@@ -371,9 +371,9 @@ await conn.deleteChat (jid) // will delete the chat (can be a group or broadcast
     ```
 - To check if a given ID is on WhatsApp
     ``` ts
-    const id = 'xyz@s.whatsapp.net'
+    const id = '123456'
     const exists = await conn.isOnWhatsApp (id)
-    console.log (`${id} ${exists ? " exists " : " does not exist"} on WhatsApp`)
+    if (exists) console.log (`${id} exists on WhatsApp, as jid: ${exists.jid}`)
     ```
 - To query chat history on a group or with someone
     ``` ts
diff --git a/src/WAConnection/5.User.ts b/src/WAConnection/5.User.ts
index 68795b7..9406ba9 100644
--- a/src/WAConnection/5.User.ts
+++ b/src/WAConnection/5.User.ts
@@ -1,20 +1,26 @@
 import {WAConnection as Base} from './4.Events'
-import { Presence, WABroadcastListInfo, WAProfilePictureChange, WAChat, ChatModification, WALoadChatOptions } from './Constants'
+import { Presence, WABroadcastListInfo, WAProfilePictureChange, ChatModification, WALoadChatOptions } from './Constants'
 import {
     WAMessage,
     WANode,
     WAMetric,
     WAFlag,
 } from '../WAConnection/Constants'
-import { generateProfilePicture, waChatKey, whatsappID, unixTimestampSeconds } from './Utils'
+import { generateProfilePicture, whatsappID, unixTimestampSeconds } from './Utils'
 import { Mutex } from './Mutex'
-import { type } from 'os'
 
 // All user related functions -- get profile picture, set status etc.
 
 export class WAConnection extends Base {
-    /** Query whether a given number is registered on WhatsApp */
-    isOnWhatsApp = (jid: string) => this.query({json: ['query', 'exist', jid], requiresPhoneConnection: false}).then((m) => m.status === 200)
+    /** 
+     * Query whether a given number is registered on WhatsApp
+     * @param str phone number/jid you want to check for
+     * @returns undefined if the number doesn't exists, otherwise the correctly formatted jid
+     */
+    isOnWhatsApp = async (str: string) => {
+        const { status, jid } = await this.query({json: ['query', 'exist', str], requiresPhoneConnection: false})
+        if (status === 200) return { exists: true, jid: whatsappID(jid) }
+    } 
     /**
      * Tell someone about your presence -- online, typing, offline etc.
      * @param jid the ID of the person/group who you are updating