iQOO 15 vs X300
Winner
Vivo iQOO 15
The iQOO 15 wins this one, taking performance decisively. Against the X300 it's also the sounder buy at $8.69 per month of safe use.
Value Score: iQOO 15 81 · X300 73 — methodology
Who should pick which
Beyond the scores — our take on each phone and the buyer it actually suits.
The iQOO 15 undercuts most 2026 flagships on price while matching their camera and battery specs, and now carries an unusually generous 7-year security-patch promise for a sub-flagship-priced phone.
Pick it if
- ✓ value-focused performance buyers
- ✓ gamers wanting long battery life on a budget
Skip it if
- ✗ you're on a major US carrier needing full 5G bands
- ✗ you want in-country warranty service
A compact flagship with a genuinely long leash — 5 years of OS upgrades and 7 years of security patches make the X300 one of the longest-supported compact Android phones you can import today.
Pick it if
- ✓ compact-phone loyalists
- ✓ camera-focused buyers on a mid-flagship budget
Skip it if
- ✗ you need official US warranty and carrier support
- ✗ you require 1TB local storage
The lifespan decider
When specs are close, support length decides it — this is what each phone costs per month of safe use.
Category by category
Both displays are effectively the same class.
The iQOO 15's Qualcomm Snapdragon 8 Elite Gen 5 is simply the faster chip.
The X300 has the stronger camera system — same lens count, higher-grade sensors.
Battery capacities are close enough not to decide this.
Both phones' support windows end around the same time.
Overall value goes to the iQOO 15 at $8.69 per month of safe use.
Frequently asked
How long will the iQOO 15 get software updates?
iQOO/Vivo officially confirmed 5 years of major Android OS upgrades and 7 years of security patches for the iQOO 15, pushing its end-of-support date to around October 2032 — longer than most rival gaming-flagship phones at this price.
Can I use the iQOO 15 in the US?
You can only get one via import, since iQOO doesn't sell it officially in the US, Canada, or Australia. It also lacks Band 12/13/14/71, so expect unreliable or 4G-only service on major US carriers.
How long will the Vivo X300 be supported?
Vivo has officially committed to 5 major Android OS updates and 7 years of security patches for the X300, dating from its October 2025 launch. That pushes its end-of-support date out to roughly October 2032, making it one of the longest-supported compact Android phones on the market.
Is the Vivo X300 available in the US?
No. Vivo does not sell the X300 through official US channels, so any US unit is a gray-market import without manufacturer warranty or guaranteed full-band 5G support on US carriers.
Full spec table
| Spec | iQOO 15 | X300 |
|---|---|---|
| Price (street) | $650 | $700 |
| Display | 6.85-inch 2K LTPO OLED, 144Hz, up to 6000 nits peak brightness | 6.31-inch LTPO AMOLED, 1216p, 120Hz, up to 4500 nits peak brightness |
| Chipset | Qualcomm Snapdragon 8 Elite Gen 5 | MediaTek Dimensity 9500 |
| RAM | 12GB/16GB | 12GB/16GB |
| Storage | 256GB/512GB/1TB | 256GB/512GB |
| Battery | 7,000 mAh | 6,040 mAh |
| Charging | 100W wired, 40W wireless | 90W wired, 40W wireless |
| Rear cameras | 50MP main, 50MP ultra-wide, 50MP periscope 3x | 200MP main, 50MP periscope 3x, 50MP ultra-wide |
| Dimensions | 163.35 x 76.8 x 8.14-8.28 mm | 150.57 x 71.92 x 7.95 mm |
| Weight | 216 g | 190 g |
| Water resistance | IP68/IP69 | IP68/IP69 |
| Supported until | Oct 2032 | Oct 2032 |
More comparisons
Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.