iPhone 17 Pro Max Stuttering, Lagging, and Jerky Animations After iOS 26.5 Update.

Well, reading the troubleshooting steps you already performed to no avail, since the device is covered by warranty, I'd suggest that you contact Apple Support directly, using this link:--> Contact Apple for support and service , or make an appointment (*) and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> https://locate.apple.com/choose-country-region . After checking it out, they'll give you all the available options.

Regards

Giulio

(*) You can do it:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above;
• Using the "Apple Store" app, available and downloadable from AppStore.

Not every issue an individual encounters on their device can be attributed to an iOS update. If the update itself were the root cause, then every device running that same version of iOS would exhibit the identical problem. In such a scenario, the forums would be flooded with countless posts reporting the same malfunction, creating an unmistakable wave of complaints that no one could possibly overlook. The absence of such widespread reports strongly indicates that the issue is not systemic, but rather specific to the device in question.

iOS 27 is not expected to be released until September, assuming past events will continue the pattern of development and releases.

Developer beta iOS 27 is expected to release today, but restricted to Apple Developers and is not supported by Apple Support. You may need a developer’s account ($100 USD) for support from Apple’s Developer Team.

Public beta is not expected until July or August. Public beta lacks support as well and the remedy is to uninstall and roll back your device to iOS 26. Data loss can occur at any time with a public beta. So installation is at your own risk. It’s not for the faint of heart and crashes can and will occur.

Tanvir_rpn wrote:

..... Can I expect to update to ios 27 once its available?

You're not addressing Apple here and we, just users like you, are not aware of Apple's future plans, neither short nor long term, sorry.