Choosing a phone case sounds simple until you're staring at dozens of options — clear, diamond-textured, hard shell, wallet, rugged — each promising to be the "best" fit for your iPhone 17 Pro or Galaxy S23 Ultra. This guide breaks down the real differences so you can pick based on how you actually use your phone, not just marketing copy.

Start With How You Use Your Phone

Before looking at materials, ask yourself three questions:

  1. Do I drop my phone often, or is my biggest worry scratches and everyday wear?
  2. Do I want the case to hide the phone's original color and design, or show it off?
  3. Do I need extra grip, a stand, or card storage?

Your answers will point you toward one of three broad categories: clear/slim cases, diamond or textured protective cases, and hard shell rugged cases.

Clear Cases: Best for Showing Off Your Phone's Design

Clear cases remain the most popular choice for a reason — they add a thin protective layer without hiding the phone's finish. For the iPhone 17 Pro's titanium or aluminum frame, a clear case lets that design element stay visible while still guarding against everyday scuffs.

The trade-off: clear cases yellow over time, especially with heat and UV exposure. Look for ones explicitly labeled anti-yellowing (usually a higher-grade TPU or polycarbonate blend) if you want it to look good a year from now, not just on day one.

Diamond Cases: Style Meets Grip

"Diamond" cases refer to a textured, faceted back panel — usually a hard polycarbonate shell with a soft TPU bumper. They're popular for two reasons: the textured back actually improves grip (a flat glossy back is genuinely more slippery), and the faceted design hides fingerprints and micro-scratches far better than a smooth clear case.

For the iPhone 17 Pro, a diamond-pattern case is a strong pick if you've had past experience with phones slipping off couches or car seats — the added texture meaningfully reduces accidental drops caused by poor grip, not just drops from height.

Hard Shell Cases: When Protection Comes First

If you've cracked a screen or shattered a back panel before, a hard shell case should be your default, not an afterthought. These typically combine:

  • A rigid polycarbonate outer shell (impact dispersion)
  • A softer inner TPU layer (shock absorption)
  • Raised edges around the camera and screen (surface-level drop protection)

Hard shell cases add the most bulk, but for anyone who's paid for a screen replacement before, that trade-off is easy to accept. Compatible options are built specifically around the camera bump and button placement of each generation, so always match the case to your exact model — an iPhone 16 Pro case will not align correctly with the 17 Pro's camera housing.

What About the Galaxy S23 Ultra and the S Pen?

S23 Ultra owners have an extra consideration most iPhone buyers don't: the S Pen. If you use the S Pen regularly, check that your chosen case doesn't block the pen's charging contact or the small slot it slides into. Some diamond and hard shell cases redesign this cutout poorly, making it awkward to remove the pen one-handed.

If your original S Pen is lost or the tip is worn down, it's worth checking replacement S Pen options before assuming you need to replace the whole device — S Pen tips and full replacement pens (including Bluetooth-enabled versions) are sold separately and are a fraction of the cost of a new phone.

Cases for Women: Style Without Sacrificing Protection

A growing number of buyers specifically look for phone cases designed with slimmer profiles, patterned finishes, or softer color palettes without giving up drop protection. The good news: you don't have to choose between style and protection anymore. Many hard shell and diamond cases now come in finishes designed for exactly this — sparkly, pastel, or floral diamond-textured backs that still carry the same two-layer protective construction as the more "rugged-looking" versions.

Don't Forget the Screen Itself

A case protects the back and sides, but not the display. Pair any case purchase with a tempered glass screen guard rated for your exact model — for curved-edge phones like the S23 Ultra, make sure the glass is a full-coverage curved design, not a flat piece that leaves the edges exposed.

Buds and Watch Cases: Complete the Set

If you're protecting your phone, it's worth doing the same for the accessories you carry alongside it. Clear silicone cases for the Galaxy Buds and earbuds cases protect against the exact same scuffs and drops phone cases guard against, and they're inexpensive enough to buy as a set. The same logic applies to your smartwatch — a case scratch on your watch face is just as visible day to day as one on your phone.

Quick Buying Checklist

  • Confirm the exact model number (17 Pro vs 17 Pro Max, S23 Ultra vs S24 Ultra) before ordering
  • Decide: showing off the phone's design (clear) vs texture and grip (diamond) vs maximum protection (hard shell)
  • Check S Pen cutout compatibility if you own an S23 Ultra
  • Pair with a full-coverage tempered glass screen protector
  • Consider anti-yellowing material if choosing a clear case

Frequently Asked Questions

Do diamond cases add much bulk compared to clear cases?Slightly, since the textured back panel is a bit thicker than a plain clear TPU shell, but it's usually only a millimeter or two — not enough to affect wireless charging in most cases.

Will a hard shell case block wireless charging?Good quality hard shell cases are designed to be wireless-charging compatible, but very thick rugged cases (especially ones with built-in battery packs) can slow charging speed. Standard hard shell cases sold for daily use are fine.

Can I use an iPhone 16 Pro case on an iPhone 17 Pro?No. Camera module size and position typically shift generation to generation, so a case cut for the 16 Pro's camera bump won't align with the 17 Pro.

Final Thoughts

The "best" case isn't a single answer — it's whichever category matches how hard you are on your phone and how much you care about showing off its design. Whichever you choose, always cross-check the exact model number, and consider protecting your other daily-carry devices at the same time.

Related reading: our guide to AirTag cases and keychains and MacBook screen protectors.