[Sony Xperia X Performance Guides, News, & Discussi] RockStar2005:
So far, this phone is pretty awesome! For only a 3GB phone, it puts my now about to be sold 4GB S7 to SHAME in terms of speed. lol I mean there is NO lag AT ALL. Even when I shut it down, it shuts off so fast you can barely tell it's done! Like 2-3 seconds. Fingerprint sensor is super quick, no lag. Phone is gorgeous.......LOVE the brushed aluminum backside with the hairline finish (only available on graphite black and white/silver versions). Very classy.

Had a minor hiccup after downloading the APN settings (nice to have that feature vs. doing it manually). After I rebooted it didn't seem to work for making calls. So I realized early on the stock Contacts app on the phone is kinda shi**y & unstable lol, so I disabled it, and after a few tries, I found this one called Contacts +, and it seems to work perfectly! So that's resolved. Apparently, the STOCK texting app is even better than the Google Messenger one I've used for a while now. Actually has a read Delivery report for SMS messages and a Read report for MMS messages (Google Messenger doesn't have the second one), and looks JUST LIKE GM too. So I'll be keeping that one.

Update: I've decided to just use Google Messenger. The read report feature on stock messaging app doesn't seem to work? If someone wants to test it more extensively, feel free to and let us know here if it does or not.

NEWEST update: Google Messenger, which NEVER gave me any issues before, started doing this weird thing where if I was in a group (MMS) texting chat, my responses would be sent not only to the group but also to each recipient individually too! So I decided to give a former favorite of mine, Textra, a chance. Tested it out with a couple buddies, and everything is fine again! So for the XP, you may want to seriously consider using Textra to avoid this issue. It also comes with an "iOS-style emoji plug-in" which I got also b/c I prefer the iOS style of emojis over the Android ones. But this is completely optional. You could of course just use the stock texting app, but any app with a cheesy "smiley" face on it gets on my nerves pretty quickly so I tend to avoid them. lol

The int'l version from NGP (see US Amazon) comes with a QNovo QC 2.0 (UCH10) int'l charger and adapter, NOT the UCH12 QC 3.0 one that apparently this phone is capable of handling. The adapter is kinda crappy and I let NGP know about it. The prongs on the adapter are a bit too thin, so although it slides into the wall outlet fine, it seems a bit loose and just a small tug will pull it out of place or out completely. Can you say fire hazard?! lol I'm getting another charger instead (see below)..... a much better QC 3.0 one.

There are a few things though that need to be addressed (ANY input or help would be greatly appreciated!):

1) When the phone is on a call, instead of going to 4G (since no VoLTE, which I'm not happy about and we'll discuss in a second lol), it goes to 3G. Why is this happening?? I know it's the int'l version and all, but is there a way to alter it is so that it STAYS in 4G?? Any "flashware" that doesn't require unlocking the bootloader or rooting?? My parents have the Xperia Z1s which doesn't have VoLTE but was bought through T-Mobile, and it stays in 4G during calls, so wtf? lol

2) Is there any flashware to put VoLTE on this phone? I know some foreign versions of the XP have VoLTE, but apparently the int'l version does not. At least with VoLTE I'd have LTE during the call.

3) I'd downloaded the phone settings automatically using an option in Settings (Settings-->More-->Internet settings, then make sure to reboot after you're done), so NO NEED to do it manually. That went well. Phone calls and texts are coming through fine now. I notice though that when in LTE, it doesn't say 4G LTE, just LTE. Is that normal? Does that mean 4G LTE??? lol

Battery life is pretty good, but not the greatest. For a flagship phone, Sony should've given the XP a MINIMUM 3000 mAh battery. To alleviate this though, I use the 360 Hibernation Master app which only seems to work with Xperia phones. The app does its thing when the screen is off though, not on. But that still matters a lot cuz most ppl are not on their phone all day. Over a 6 hour period of the screen being off & phone uncharged, the battery level stayed the same. It's been tested by someone I know on here at about 9 hours, with only a 0%-1% drop. (That 1% is probably only because the phone was "at the border" between percentages anyway. Typically this is not the case and it simply stays the same.) I used it on my old Z3 too and loved it. Stamina Mode sucked back then b/c it caused lots of problems for me for a long time but this one didn't. I know SM's been fixed now, but it still I believe takes 15 min to kick in after the screen turns off.......... 360 starts immediately though! Only costs $1.95 via in-app purchase. Also, I just bought a highly-rated QC 3.0 charger wall charger and also a highly-rated dual QC 3.0 car charger as well (both for a great price), so that will help too.

MGS and everyone, despite these issues, I'm EXTREMELY happy with this phone!! I HIGHLY recommend it, and this clear case is pretty nice too (though I'd prefer a Spigen or Rearth one, but they were dummies and didn't make one for the XP).