htaccess allow only numbers after a certain point with https - php

Question

i attached my current htaccess file below, it currently makes all my urls www with trailing slash at the end and if it is on and only on /prepaid/ it will be https.
i am tring to extend this functionality, where i can also accept requests from /prepaid/refill/a 10 digit phone number and have it be https as well
i started by adding this line at the bottom, but how would i extend the https part to allow from this path as well?
RewriteRule ^prepaid/refill/([0-9]+)/?$ index.php?p=prepaid&phone=$1 [L]
the current code
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*)$ http://www.domain.com/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !(.*)/$
RewriteRule ^(.*)$ $1/ [L,R=301]
RewriteCond %{HTTPS} off
RewriteCond %{QUERY_STRING} !. [NC]
RewriteRule ^prepaid/?$ https://www.domain.com/prepaid/ [R=301,L]
RewriteCond %{HTTPS} on
RewriteRule ^prepaid/(.+) http://www.domain.com/prepaid/$1 [R=301,L,QSA]
RewriteRule ^prepaid/?$ index.php?p=prepaid [L]
RewriteRule ^prepaid/h2o-wireless/?$ index.php?p=prepaid&s=h2o [L]
RewriteRule ^prepaid/net10-wireless/?$ index.php?p=prepaid&s=net10 [L]
RewriteRule ^prepaid/page-plus-cellular/?$ index.php?p=prepaid&s=pageplus [L]
RewriteRule ^prepaid/red-pocket-mobile/?$ index.php?p=prepaid&s=redpocket [L]
RewriteRule ^prepaid/simple-mobile/?$ index.php?p=prepaid&s=simplemobile [L]

Answer 1

Have your full .htaccess like this:
RewriteEngine On
RewriteBase /
# force www
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^ http://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
# force trailing slash
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule [^/]$ %{REQUEST_URI}/ [L,R=301]
# force HTTPS for /prepaid/ OR /prepaid/refill/([0-9]+)/
RewriteCond %{HTTPS} off
RewriteCond %{QUERY_STRING} !.
RewriteRule ^prepaid(/refill/[0-9]+)?/?$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L,NC]
# force HTTP for everything else
RewriteCond %{HTTPS} on
RewriteRule ^prepaid/(?!refill/[0-9]+).+$ http://%{HTTP_HOST}%{REQUEST_URI} [R=301,L,NC]
# internal rewrites
RewriteRule ^prepaid/?$ index.php?p=prepaid [L,QSA,NC]
RewriteRule ^prepaid/h2o-wireless/?$ index.php?p=prepaid&s=h2o [L,QSA,NC]
RewriteRule ^prepaid/net10-wireless/?$ index.php?p=prepaid&s=net10 [L,QSA,NC]
RewriteRule ^prepaid/page-plus-cellular/?$ index.php?p=prepaid&s=pageplus [L,QSA,NC]
RewriteRule ^prepaid/red-pocket-mobile/?$ index.php?p=prepaid&s=redpocket [L,QSA,NC]
RewriteRule ^prepaid/simple-mobile/?$ index.php?p=prepaid&s=simplemobile [L,QSA,NC]
RewriteRule ^prepaid/refill/([0-9]+)/?$ index.php?p=prepaid&phone=$1 [L,QSA,NC]

Answer 2

to use https need write some ike this
with regular expressions, you must be caution and be:
\d+ - its only numberic characters
RewriteEngine On
RewriteCond %{HTTPS} on
RewriteRule ^prepaid/refill/(\d+)/?$ index.php?p=prepaid&phone=$1 [L]