Finlandnoob, to the Linux Community of Bleeping Computer Forums!
We're happy to have you abroad & hopefully can assist you in this matter.
If you have the ISO, can transfer to an external drive, you can burn (not write) the image to a DVD, that is, if the optical drive is capable of burning. These are fairly low in cost, even the USB attached portable versions. So are USB sticks, though normally the best deals are found online. The issue at hand, I take it, is there's no OS installed, making these tasks difficult. Haven't heard of anyone creating bootable media from a smartphone.
This is really something that should had been performed before selling the SSD, unless it contained no OS. Planning is of essence, and really, the Ubuntu install would had ran a lot faster on the SSD.
Finally, do you have any friends/family members or neighbor (anyone?) who'll allow you the use of their computer to download the ISO & burn a DVD? That would be your best bet if you don't have an OS installed, IMO. You're going to have to gain access to a computer to accomplish what you want to do. And once Ubuntu is installed, and know that either your notebook has a DVD burner that works well, or have a USB stick (USB 2.0 sticks are best for creating bootable ISO's), then you can try out other OS's.
FIrst things first, if you have no one that'll allow you access to their computer to burn a DVD, you're going to have to get some type of OS installed to where you can get something done. If by chance you have a Windows 7 DVD laying around (as long as it's not a branded reinstall DVD), you can use that for up to 30 days w/out a COA. That's plenty long enough to download & create a bootable Linux DVD. By that, am simply laying out your options on the table. Really it doesn't have to be updated nor secured for this purpose, just run long enough to download the ISO & create bootable media, all that matters is that the MD5, SHA1 or preferably SHA-256 hashes matches the ISO downloaded. Many Linux distros are now providing SHA-256 hashes for security of the ISO.
You can also use any Linux CD or DVD you can find to install the OS to download & burn a DVD. Or you can purchase one online from OSDisc.com.
If you have no one to assist you, then that's the only thing I can suggest, unless you have some type of OS install media laying around to install temporarily to get you where you want to be, and will need a computer to access that site, though you can use your smartphone for that purpose.
At this stage, am fresh out of other suggestions, though the link above may be your best bet, just make sure that Ubuntu is what you want. And if your notebook has an AMD graphics card, will have to go with Ubuntu 14.04, if Intel or nVidia, can run 16.04, supported until April 2021.