updated sms and phone app readme to match main

SMS & Phone App Guide.md

@@ -1,6 +1,6 @@
-## SMS App (4G variant only) - Meck v0.9.2 (Alpha)
+## SMS & Phone App (4G variant only) - Meck v0.9.3 (Alpha)
 
-Press **T** from the home screen to open the SMS app.
+Press **T** from the home screen to open the SMS & Phone app.
 Requires a nano SIM card inserted in the T-Deck Pro V1.1 4G modem slot and an
 SD card formatted as FAT32. The modem registers on the cellular network
 automatically at boot — the red LED on the board indicates the modem is
@@ -12,7 +12,7 @@ cellular network, which takes roughly 15 seconds.
 
 | Context | Key | Action |
 |---------|-----|--------|
-| Home screen | T | Open SMS app |
+| Home screen | T | Open SMS & Phone app |
 | Inbox | W / S | Scroll conversations |
 | Inbox | Enter | Open conversation |
 | Inbox | C | Compose new SMS (enter phone number) |
@@ -20,15 +20,23 @@ cellular network, which takes roughly 15 seconds.
 | Inbox | Q | Back to home screen |
 | Conversation | W / S | Scroll messages |
 | Conversation | C | Reply to this conversation |
+| Conversation | F | Call this number |
 | Conversation | A | Add or edit contact name for this number |
 | Conversation | Q | Back to inbox |
 | Compose | Enter | Send SMS (from body) / Confirm phone number (from phone input) |
 | Compose | Shift+Del | Cancel and return |
 | Contacts | W / S | Scroll contact list |
 | Contacts | Enter | Compose SMS to selected contact |
+| Contacts | F | Call selected contact |
 | Contacts | Q | Back to inbox |
 | Edit Contact | Enter | Save contact name |
 | Edit Contact | Shift+Del | Cancel without saving |
+| Dialing | Enter or Q | Cancel / hang up |
+| Incoming Call | Enter | Answer call |
+| Incoming Call | Q | Reject call |
+| In Call | Enter or Q | Hang up |
+| In Call | W / S | Volume up / down (0–5) |
+| In Call | 0–9, *, # | Send DTMF tone |
 
 ### Sending an SMS
 
@@ -45,11 +53,49 @@ There are three ways to start a new message:
 Messages are limited to 160 characters (standard SMS). A character counter is
 shown in the footer while composing.
 
+### Making a Phone Call
+
+Press **F** to call from either the conversation view or the contacts
+directory. The display switches to a dialing screen showing the contact name
+(or phone number) and an animated progress indicator. Once the remote party
+answers, the screen transitions to the in-call view with a live call timer.
+
+There are two ways to start a call:
+
+1. **From a conversation** — open a conversation and press **F**. You can call
+   any number you have previously exchanged messages with, whether or not it is
+   saved as a named contact.
+2. **From the contacts directory** — press **D** from the inbox, scroll to a
+   contact, and press **F**.
+
+> **Note:** There is currently no way to dial an arbitrary phone number without
+> first creating a conversation. To call a new number, press **C** from the
+> inbox to compose a new SMS, enter the phone number, send a short message,
+> then open the resulting conversation and press **F** to call.
+
+During an active call, **W** and **S** adjust the speaker volume (0–5). The
+number keys **0–9**, **\***, and **#** send DTMF tones for navigating phone
+menus and voicemail systems. Press **Enter** or **Q** to hang up.
+
+Audio is routed through the A7682E modem's internal codec to the board speaker
+and microphone — no headphones or external audio hardware are required.
+
+### Receiving a Phone Call
+
+When an incoming call arrives, the app automatically switches to the incoming
+call screen regardless of which view is active. A short alert and buzzer
+notification are triggered. The caller's name is shown if saved in contacts,
+otherwise the raw phone number is displayed.
+
+Press **Enter** to answer or **Q** to reject the call. If the call is not
+answered it is logged as a missed call and a "Missed: ..." alert is shown
+briefly.
+
 ### Contacts
 
 The contacts directory lets you assign display names to phone numbers.
-Names appear in the inbox list, conversation headers, and compose screen
-instead of raw numbers.
+Names appear in the inbox list, conversation headers, call screens, and
+compose screen instead of raw numbers.
 
 To add or edit a contact, open a conversation with that number and press **A**.
 Type the display name and press **Enter** to save. Names can be up to 23
@@ -78,15 +124,15 @@ The 4G modem can be toggled on or off from the settings screen. Scroll to
 **4G Modem: ON/OFF** and press **Enter** to toggle. Switching the modem off
 kills its red status LED and stops all cellular activity. The setting persists
 to SD card and is respected on subsequent boots — if disabled, the modem and
-LED stay off until re-enabled. The SMS app remains accessible when the modem
-is off but will not be able to send or receive messages.
+LED stay off until re-enabled. The SMS & Phone app remains accessible when the
+modem is off but will not be able to send or receive messages or calls.
 
 ### Signal Indicator
 
-A signal strength indicator is shown in the top-right corner of all SMS
-screens. Bars are derived from the modem's CSQ (signal quality) reading,
+A signal strength indicator is shown in the top-right corner of all SMS and
+call screens. Bars are derived from the modem's CSQ (signal quality) reading,
 updated every 30 seconds. The modem state (REG, READY, OFF, etc.) is shown
-when not yet connected.
+when not yet connected. During a call, the signal indicator remains visible.
 
 ### SD Card Structure
 
@@ -110,7 +156,10 @@ SD Card
 | Timestamps show `---` | Modem clock hasn't synced yet (wait ~15 seconds after modem startup), or messages were saved before clock sync was available |
 | Red LED stays on after disabling modem | Toggle the setting off, then reboot — the boot sequence ensures power is cut when disabled |
 | SMS sends but no delivery | Check signal strength; below 5 bars is marginal. Move to better coverage |
+| Call drops immediately after dialing | Check signal strength and ensure the SIM plan supports voice calls |
+| No audio during call | The A7682E routes audio through its own codec; ensure the board speaker is not obstructed. Try adjusting volume with W/S |
+| Cannot dial a number | You must first have a conversation or saved contact for that number. Send a short SMS to create a conversation, then press F |
 
-> **Note:** The SMS app is only available on the 4G modem variant of the
-> T-Deck Pro. It is not present on the audio or standalone BLE builds due to
-> shared GPIO pin conflicts between the A7682E modem and PCM5102A DAC.
+> **Note:** The SMS & Phone app is only available on the 4G modem variant of
+> the T-Deck Pro. It is not present on the audio or standalone BLE builds due
+> to shared GPIO pin conflicts between the A7682E modem and PCM5102A DAC.