add warning about updating Loop before switching to iOS 26

Author: marionbarker

docs/build/phone.md

@@ -38,7 +38,12 @@ These phones require *iOS* 26 and `Loop version 3.8.x` or newer
 
 - iPhone 17, all variants
 
-These phones require *iOS* 18 and are compatible with *iOS* 26
+!!! important "iOS 26 requires `Loop v3.8.2` or newer"
+    Any iPhone 17 must run iOS 26. Changes to `Loop v3.7.x` and earlier were required to support iOS 26. These updates are found in `Loop v3.8.2` and newer.
+
+    **Do not attempt to run an earlier version of Loop on any iOS 26 phone, use `Loop v3.8.2` or newer.**
+
+These phones require *iOS* 18 and are compatible with *iOS* 26.
 
 - iPhone 16, all variants: **not recommended for use with Omnipod**
     * iPhone 16 is compatible but see [InPlay DASH pod](../faqs/omnipod-faqs.md#iphone-16-and-atlas-or-inplay-dash-pods){: target="_blank" } warning

docs/faqs/new-phone.md

@@ -5,6 +5,12 @@
 
     You can choose to keep Looping on the old phone and swap later. Most vendors give you more than a week to turn in your old device for credit.
 
+!!! warning "New Phone Requires iOS Update"
+    In general, when you get a new phone you are required to update that phone to the latest operating system before you can finish onboarding.
+
+    Be sure to update to the latest version of Loop on your old phone before configuring your new phone.
+
+    For example - if you transfer to an iOS 26 phone with `Loop v3.7.x` or older, you will not be able to manually bolus. Do yourself a favor and install an update before you switch phones.
 
 !!! abstract "Phone Transition Overview - Detailed steps below"
 
@@ -81,6 +87,12 @@ Some people don't have access to their old phone. There are instructions for han
 
 When you change phones, *Apple* will force you to the latest iOS version available for your new phone.
 
+!!! important "iOS 26 requires `Loop v3.8.2` or newer"
+    Changes to `Loop v3.7.x` and earlier were required to support iOS 26. These updates are found in `Loop v3.8.2` and newer.
+
+    **Do not attempt to run an earlier version of Loop on any iOS 26 phone, use `Loop v3.8.2` or newer.**
+
+
 ### Prepare Before Upgrade
 
 If you are using Dexcom, record the transmitter or sensor number in case it doesn't transfer