Looking for Feedback on Tecnis Symfony

I'm sorry I can't help you.  I've never heard of Tecnis Symfony lenses.  I lucked out and didn't require glasses after my surgery, in spite of the surgeon tellig me I most likely would need them.  I too had the monofocal lenses.  Good luck.  Do you due diligence and research, research, research.

With Symfony IOLs I am able to use a smartphone without any trouble with its usual fonts I've never changed, held at what seems like a normal distance (don't have a ruler handy to measure). I haven't been using an  iPhone,  I don't know what size screen your model is. After my surgery (in December 2014 for both eyes) it was first an HTC One M7 with a 4.7" screen, now a Samsung Galaxy S7 with a 5.1" screen. On sites with multiple columns like some newspapers, the print may be a bit small in multicolumn mode (to where I'd need to adjust where I hold the phone and concentrate), but usually that isn't how you'd read those anywa. On Android at least double tapping to expand one column to its full width   leaves it easily readable (or putting the phone on its side in landscape mode might also work with small multi-column fonts).

In my case I was highly myopic beforehand, which meant there was more room for error in the choice of lens power and one of my eyes wound up slightly farsighted, +0.5D, which reduces its near vision a bit. The other eye was on target at 0D, so its mostly that one eye being used for really near distances so I'm mostly reading the smartphone with one eye I suspect like you would be (though the other eye still has better near than you would with a monofocal so it may be contributing some). I have 20/25 near vision at my best near distance, where I naturally hold the chart, and can read the small print on eyedrop bottles (though for that I do need to hunt for the best distance to hold it). I do need to use reading glasses for rare closeup tasks like threading a needle. 

Its often suggested that people get micro-monovision with the Symfony, with one eye adusted slightly nearer in like -0.5D (and I may get a laser tweak to switch my farsighted eye to that someday) since that isn't enough to have much of an impact on distance vision. If you have good distance vision with your monofocal eye then you might consider getting the Symfony with a bit of micro-monovision to ensure you have enough to read your eyephone. Unfortunately everyone's results differ depending on the rest of their visual system and so even studies on lenses merely give guidance as to average results. A  small minority of patients with the Symfony do need reading glasses for near. I haven't checked into the issue, but I have to wonder how much of a difference age makes, if younger patients are more likely to have more sensitive retinas and higher quality visual systems to get better results. (I'm not as young as you, but I got my surgery at age 52 which is still atypically young for a cataract patient by a couple of decades or so).

I went for the Symfony due to its lower risk of visual artifacts compared to a multifocal. (actually it wasn't approved here in the US at the time so I went to Europe to get it, figuring I may be living with the results another few decades so it was worth some hassle&expense). However if you wanted to ensure more near vision, then you might consider a multifocal lens (in the US a bifocal, elsewhere a trifocal) if you were willing to deal with some risk of halo&glare issues at night. The risk is lower in the newest multifocals than it used to be, but not as low as with the Symfony. I'd initially planned to go outside the US for a trifocal, but decided the lower risk of the Symfony was a good compromise, though more importantly its better intermediate vision since I use that more. Occasionally I still wonder if I should have gone for a trifocal for a broader range of vision since I could have gotten a lens exchange to the Symfony if I had issues, its hard to know if I'd have noticed the difference with the intermediate or not. 

Since you are only doing one eye, that would lower the impact of any halo&glare issues if you did have them if you went for a multifocal. My night vision with the Symfony is better than I can remember it being before surgery with contacts or glasses. I've no glare issues, less than I can remember with contacts&glasses, but I am in the tiny minority that does see a halo with the Symfony but its so light, translucent, that I see through/past it and don't consider it a problem. 

I had the Symfony implanted to my right eye one week ago ( in US)-

If you have a monofocal IOL already, you will be functioning as a "monovision" patient and will rely on one eye for reading.

That's how I'm functioning currently while I decide on what to do with my left eye.

I'm finding the range of intermediate vision to be about from 14 inches to 26. I wear readers to get close near vision. It's my feeling that the Symfony is functional as a monovision but would work better if in BOTH eyes. Looking at my iPhone in low light conditions is difficult and I have to enlarge fonts.

There is a reduction in vision in dim light conditions and halos and rings around lights- which does not bother me but may bother someone else. Everyone responds to these changes differently.

You might consider explanting the monofocal and getting a Symfony in that eye as well. There are , of course, risks to removing an IOL.

I am 58, a cataract surgeon myself. I have NO financial relationship with Abbott and paid FULL price for my surgery, and have NO relationship to my surgeon other than as a patient.

Good luck with your surgery!