Install vcard via list-packages.
Insert following lines (vcard file example, from google contacts export)
in a buffer:

BEGIN:VCARD
VERSION:3.0
TEL;TYPE=CELL:+00 000 00 00 00
CATEGORIES:myContacts
end:VCARD
BEGIN:VCARD
VERSION:3.0
TEL;TYPE=WORK:000 000 0000
CATEGORIES:myContacts
END:VCARD

in the buffer evaluate (M-:): (vcard-parse-buffer)

it will stop after the first card.

SOLUTION: in the function `vcard-parse-buffer`, (line-end-position 2)
should be replaced by (+ (line-end-position 2) 1)



In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.23,
cairo version 1.16.0)
of 2020-12-21 built on daniel-Ubuntu
Repository revision: faf3613cba8571eaef2709bd7bb6f11a956b9262
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12009000
System Description: Ubuntu 20.10

Configured using:
'configure --with-imagemagick --with-cairo --with-modules'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO IMAGEMAGICK SOUND GPM DBUS GSETTINGS
GLIB NOTIFY INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ
M17N_FLT LIBOTF ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES
THREADS LIBSYSTEMD PDUMPER LCMS2

Important settings:
  value of $LC_MONETARY: nl_NL.UTF-8
  value of $LC_NUMERIC: nl_NL.UTF-8
  value of $LC_TIME: nl_NL.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: vCard

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug sendmail vcard-parse vcard iso8601
compile comint ansi-color ring autoload radix-tree lisp-mnt tar-mode
arc-mode archive-mode cus-edit pp cus-start cus-load wid-edit misearch
multi-isearch mm-archive message dired dired-loaddefs rfc822 mml mml-sec
epa derived gnus-util rmail rmail-loaddefs text-property-search
time-date mailabbrev gmm-utils mailheader mm-decode mm-bodies mm-encode
mail-utils mule-util gnutls network-stream url-http mail-parse rfc2231
rfc2047 rfc2045 mm-util ietf-drums mail-prsvr url-gw nsm rmc puny
url-cache url-auth epg epg-config finder-inf package easymenu browse-url
url url-proxy url-privacy url-expand url-methods url-history url-cookie
url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq
eieio eieio-core cl-macs eieio-loaddefs password-cache json subr-x map
url-vars seq byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib
iso-transl tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode elisp-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors frame minibuffer cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
cairo move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 215914 19596)
(symbols 48 11177 1)
(strings 32 41500 2179)
(string-bytes 1 1277285)
(vectors 16 19501)
(vector-slots 8 250240 21585)
(floats 8 35 226)
(intervals 56 24166 107)
(buffers 984 17))