diff --git a/asterisk/conf/basic/extensions.conf b/asterisk/conf/basic/extensions.conf
index 93ca40c..c46fc65 100644
--- a/asterisk/conf/basic/extensions.conf
+++ b/asterisk/conf/basic/extensions.conf
@@ -62,7 +62,8 @@ exten => 3,1,Goto(outbound-one,${number},1)
 exten => nonum,1,Playback(unidentified-no-callback)
  same => n,Hangup()
 
-exten => timeout,1,Hangup()
+exten => timeout,1,Playback(vm-goodbye)
+ same => Hangup()
 
 [app-vm]
 exten = 1571,1,Verbose(1, "${CALLERID(num)} dialed the voicemail feature.")
diff --git a/asterisk/conf/mobile/extensions.conf b/asterisk/conf/mobile/extensions.conf
index 0cbe592..b86a64f 100644
--- a/asterisk/conf/mobile/extensions.conf
+++ b/asterisk/conf/mobile/extensions.conf
@@ -2,22 +2,68 @@
 
 ; Remember, context names for each SIP account are specified in pjsip_wizard.conf.
 ;
+[globals]
+; first queue.
+QUEUE_ONE = queue-one
+
+; Voicemail address (configured in voicemail.conf)
+VOICEMAIL_BOX = 1000@default
+
 ; First, some safeguards against abuse of the built-in contexts.
 [default]
-exten => s,1,Verbose(1, "info ${CALLERID(num)} was passed to default")
+exten => s,1,Verbose(1, "info: ${CALLERID(num)} was passed to default")
  same => n,Hangup(3)
 
 [presence]
 exten => _X.,hint,PJSIP/${EXTEN}
 
-[from-ext]
+[app-lastcallreturn]
+exten => 1471,1,Verbose(1, "info: ${CALLERID(num)} dialed app-lastcallreturn.")
+ same => n,Set(number=${DB(lastcaller/${CALLERID(num)})})
+ same => n,Answer(2)
+ same => n,GotoIf($["${number}" = ""]?nonum,1)
+ same => n,Playback(info-about-last-call&telephone-number)
+ same => n,Wait(1)
+ same => n,SayDigits(${number})
+ same => n,Wait(1)
+ same => n,Playback(to-call-num-press)
+ same => n,Playback(digits/3)
+ same => n,WaitExten(10)
+ same => n,Goto(timeout,1)
 
+exten => 3,1,Goto(outbound-one,${number},1)
+ same => n,Hangup()
+
+exten => nonum,1,Playback(unidentified-no-callback)
+ same => n,Hangup()
+
+exten => timeout,1,Playback(vm-goodbye)
+ same => Hangup()
+
+[app-vm]
+exten = 1571,1,Verbose(1, "info: ${CALLERID(num)} dialed voicemail")
+ same = n,VoiceMailMain(${CALLERID(num)}@default,s)
+ same = n,Hangup()
+
+[from-quectel0]
+exten => s,1,Queue(${QUEUE_ONE},nr,,,50)
+ same => n,Answer(500)
+ same => n,Voicemail(${VOICEMAIL_BOX},su)
+ same => n,Hangup()
+
+[from-ext]
 exten => 123,1,Goto(i,1)
  same => n,Hangup()
 
 exten => _XX.,1,Dial(Quectel/quectel0/${EXTEN},,r)
  same => n,Hangup()
 
+exten => 1471,1,Goto(app-lastcallreturn,${EXTEN},1)
+ same => n,Hangup()
+
+exten => 1571,1,Goto(app-vm,${EXTEN},1)
+ same => n,Hangup()
+
 exten => i,1,Answer(1)
  same => n,PlayTones(info)
  same => n,Wait(2)
@@ -27,3 +73,8 @@ exten => i,1,Answer(1)
  same => n,Playback(cannot-complete-as-dialed&check-number-dial-again)
  same => n,PlayTones(info)
  same => n,Hangup()
+
+[to-ext]
+exten => s,1,Set(DB(lastcaller/${EXTEN})=${CALLERID(num)})
+ same => n,Dial(PJSIP/${EXTEN},,r)
+ same => n,Hangup()
diff --git a/asterisk/conf/mobile/quectel.conf b/asterisk/conf/mobile/quectel.conf
index 6e7b686..f269c90 100644
--- a/asterisk/conf/mobile/quectel.conf
+++ b/asterisk/conf/mobile/quectel.conf
@@ -78,7 +78,7 @@ dtmf = relax			; control of incoming DTMF detection, possible values:
 
 ; quectel required settings
 [quectel0]
-context = quectel0
+context = from-quectel0
 exten = +447123456789
 
 audio = /dev/ttyUSB1		; tty port for audio connection; 	no default value
diff --git a/asterisk/conf/mobile/queues.conf b/asterisk/conf/mobile/queues.conf
new file mode 100644
index 0000000..aace8a9
--- /dev/null
+++ b/asterisk/conf/mobile/queues.conf
@@ -0,0 +1,49 @@
+; /etc/asterisk/queues.conf
+;
+; Global queue settings go in this section.
+;
+; Modifed and "borrowed" (read: stolen) https://www.sacredheartsc.com/blog/building-a-personal-voip-system/
+;
+[general]
+; Persist dynamic member lists in the astdb.
+persistentmembers = yes
+
+; Some options for more intuitive queue behavior.
+autofill                = yes
+monitor-type            = MixMonitor
+shared_lastcall         = yes
+log_membername_as_agent = yes
+
+;;;;;;;;;;;;;;;;;;;
+; Queue Definitions
+;;;;;;;;;;;;;;;;;;;
+
+; The first queue is for incoming calls to our lines.
+[queue-one]
+; For each incoming call, ring all members of the queue.
+strategy = ringall
+
+; Max number of seconds a caller waits in the queue.
+timeout = 90
+
+; Don't announce estimated hold time, etc.
+announce-frequency          = 0
+announce-holdtime           = no
+announce-position           = no
+periodic-announce-frequency = 0
+
+; Allow ringing even when no queue members are present.
+joinempty      = yes
+leavewhenempty = no
+
+; Ring member phones even when they are on another call.
+ringinuse = yes
+
+; Queue Members
+;
+; Each member is specified with the following format:
+;  member => INTERFACE,PENALTY,FRIENDLY_NAME,PRESENCE_INTERFACE
+;
+; The "penalty" value is not interesting for our use case.
+; With PJSIP, the BLF/Presence interface is identical to the standard interface name.
+member => Local/1000@to-ext,0,1000,PJSIP/1000
diff --git a/asterisk/conf/mobile/voicemail.conf b/asterisk/conf/mobile/voicemail.conf
new file mode 100644
index 0000000..7532a79
--- /dev/null
+++ b/asterisk/conf/mobile/voicemail.conf
@@ -0,0 +1,47 @@
+[general]
+format = wav49|gsm|wav
+
+[zonemessages]
+; Users may be located in different timezones, or may have different
+; message announcements for their introductory message when they enter
+; the voicemail system. Set the message and the timezone each user
+; hears here. Set the user into one of these zones with the tz= attribute
+; in the options field of the mailbox. Of course, language substitution
+; still applies here so you may have several directory trees that have
+; alternate language choices.
+;
+; Look in /usr/share/zoneinfo/ for names of timezones.
+; Look at the manual page for strftime for a quick tutorial on how the
+; variable substitution is done on the values below.
+;
+; Supported values:
+; 'filename'    filename of a soundfile (single ticks around the filename
+;               required)
+; ${VAR}        variable substitution
+; A or a        Day of week (Saturday, Sunday, ...)
+; B or b or h   Month name (January, February, ...)
+; d or e        numeric day of month (first, second, ..., thirty-first)
+; Y             Year
+; I or l        Hour, 12 hour clock
+; H             Hour, 24 hour clock (single digit hours preceded by "oh")
+; k             Hour, 24 hour clock (single digit hours NOT preceded by "oh")
+; M             Minute, with 00 pronounced as "o'clock"
+; N             Minute, with 00 pronounced as "hundred" (US military time)
+; P or p        AM or PM
+; Q             "today", "yesterday" or ABdY
+;               (*note: not standard strftime value)
+; q             "" (for today), "yesterday", weekday, or ABdY
+;               (*note: not standard strftime value)
+; R             24 hour time, including minute
+;
+eastern = America/New_York|'vm-received' Q 'digits/at' IMp
+central = America/Chicago|'vm-received' Q 'digits/at' IMp
+central24 = America/Chicago|'vm-received' q 'digits/at' H N 'hours'
+military = Zulu|'vm-received' q 'digits/at' H N 'hours' 'phonetic/z_p'
+european = Europe/Copenhagen|'vm-received' a d b 'digits/at' HM
+uk = Europe/London|'vm-received' q 'digits/at' HM
+
+[default]
+; Note: The rest of the system must reference mailboxes defined here as mailbox@default.
+
+1000 => 1000,Default Mailbox,,,,Tz=uk