Maybe this will help:

https://askubuntu.com/questions/229287/how-do-i-make-ubuntu-appear-as-a-bluetooth-keyboard

Here's my question:  If you have a laptop with you, then why use the
phone for email?  Is it because you can use your data connection when
there is no WiFi?  What I would do is use the phone as a WiFi hotspot
and then use the laptop for email.  I don't know if all Android phones
with all carriers can do that, but with T-Mobile I've been doing it
and it works great.

On Tue, Aug 1, 2017 at 1:22 PM, Steve Trapp <stevetrapp at comcast.net> wrote:
> In-lined my reply:
>
> On Tue, Aug 01, 2017 at 12:06:45PM -0500, Mike Miller wrote:
>> I didn't understand this: "I'm all over on communications and it is
>> **all** done in my smartphone (the communicator)."  At first I thought
>> you were talking about a specific app, but maybe you just mean that
>> you communicate a lot through your phone.  So you need to use it for
>> email and stuff, which means typing a lot with the phone.  Have you
>> tried buying a portable bluetooth keyboard?  Example:
>
> Yes, I use my phone for almost all communications (GroupMe, facebook, meetup
> amongst others). The exception is email is usually done on a laptop...
>
>> Closed size: 5.8" x 3.6" x 0.7", Open Size: 9.9" x 3.5" x 0.2"
>> https://www.amazon.com/Bluetooth-Keyboard-Portable-Keyboards-Smartphone/dp/B00WSL8FH4/
>>
>> I don't know if that one is better than any of the others.  A few are
>> compared in a table -- scroll down to see it.
>>
>> Mike
>
> Thanks, I've seen many offers for *real* BlueTooth keyboards. But I'm reluctant
> to carry a BlueTooth keyboard *and* a laptop. I once had Linux-laptop-running-
> as-a-Bluetooth-Keyboard, so I know it's possible; so I can do it again, and
> this time WRITE DOWN the procedure! (Configuration can be a <BLEEP!>).
>
>>
>> On Tue, Aug 1, 2017 at 11:47 AM, Steve Trapp <stevetrapp at comcast.net> wrote:
>> > I think my smartphone has a 5.1_inch display.
>> >
>> > I mostly use Android apps, of course, on my Samsung Galaxy S7. But I do run
>> > GNURoot-Debian for the following applications and don't use any andoid app for
>> > these:
>> > : ssh
>> > : scp
>> > : sftp
>> > : Reluctanly, I use it" for access to my comcast.net-sited "email". (It's
>> >   better than nothing when you didn't bring your laptop with you).
>> > [Note: add your favorite computers' IP addresses to GNURoot-path
>> > /etc/hosts--Android seems to not do DNS well--at least within GNURoot?!]
>> >
>> > So I use GNURoot for all file transfers to/from my {laptop, desktop} from/to my
>> > < allegedly smart >-phone, and SSH-ing.
>> >
>> > And that is mostly it. I can, however, put a few of my relative seldom used
>> > homebrewed C programs on it, if I find they're at all useful (and they can't
>> > do X11...). I just haven't got around to it yet.
>> >
>> > Plus, I'm planning on putting a bunch of data on the smarty-pants-phone
>> > so I have that data at my fingertips. Haven't got around to this, either, yet.
>> >
>> > Lastly, I can also ssh to my desktop (typically the laptop isn't "on" 24 hours
>> > but the desktop is) if I don't have my laptop with me, I can still get access
>> > to my desktop-Linux/GNU-Box for, say, a file or a line of information from a
>> > file.
>> >
>> > And, I have a crude app to get my POP3 email on my desktop to send the HTML
>> > version of the email to the phone so I can read it. I did this with mutt,
>> > and liberal use of nc (nc is netcat) in /bin/sh scripts.
>> >
>> > Of course all of this stinks, because the keyboard has to be so small.
>> > But it works well enough.
>> >
>> > I did once figure out how to make my Linux laptop act as a Bluetooth keyboard,
>> > but unfortunately I didn't write the procedure down. I am interested in trying
>> > it again soon, however, because of another problem, namely, I'm all over on
>> > communications and it is **all** done in my smartphone (the communicator).
>> > So a real keyboard would make it much easier to write messages, emails,
>> > even a GNURoot session.
>> >
>> > On Tue, Aug 01, 2017 at 12:45:29AM -0500, Mike Miller wrote:
>> >> Thanks for the info, Steve.  I'll be giving it a try, too.
>> >>
>> >> Yeah, a 1920x1080 smartphone could be hard on the eyes, to say the
>> >> least.  Maybe it's a little easier on a Fire HD 8.  Also, you can
>> >> usually change fonts and icon sizes in Linux, so that could help.
>> >>
>> >> I'm thinking of using VNCviewer on it.  Have any of you ever done that?
>> >>
>> >> Mike
>> >>
>> >> On Mon, Jul 31, 2017 at 6:15 PM, Iznogoud <iznogoud at nobelware.com> wrote:
>> >> > Oh man, it pains me to think of using a terminal on a smartphone for anything
>> >> > more than one command! My eyes would totally suck at this, as would my fingers.
>> >> >
>> >> > It did help to be able to SSH to my iphone and do some tweaking from a proper
>> >> > system when I had to.
>> >> > _______________________________________________
>> >> > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
>> >> > tclug-list at mn-linux.org
>> >> > http://mailman.mn-linux.org/mailman/listinfo/tclug-list
>> >> _______________________________________________
>> >> TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
>> >> tclug-list at mn-linux.org
>> >> http://mailman.mn-linux.org/mailman/listinfo/tclug-list
>> >
>> > --
>> > Name: Steve Trapp
>> > Location: Just east of the Missippi River
>> > Email-address: stevetrapp<AT>comcast<DOT>net
>> > Homepage: comcast DROPPED ALL HOMEPAGES--Where do I put my PGP public key now?
>> > _______________________________________________
>> > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
>> > tclug-list at mn-linux.org
>> > http://mailman.mn-linux.org/mailman/listinfo/tclug-list
>> _______________________________________________
>> TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
>> tclug-list at mn-linux.org
>> http://mailman.mn-linux.org/mailman/listinfo/tclug-list
>
> --
> Name: Steve Trapp
> Location: Just east of the Missippi River
> Email-address: stevetrapp<AT>comcast<DOT>net
> Homepage: comcast DROPPED ALL HOMEPAGES--Where do I put my PGP public key now?
> _______________________________________________
> TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
> tclug-list at mn-linux.org
> http://mailman.mn-linux.org/mailman/listinfo/tclug-list