Hi there Jon. [br]
[br]
I, as has Jerry, have seen this question asked multiple times in multiple places. However, I have a solid conclusion (at least my opinion, YMMV and all that). [br]
[br]
I will always and forever recommend getting the screen with the frame. [br]
[br]
First off, Samsung sells official screens directly to authorized repair centers pre-mounted in the frame. Whenever I get my screens in stock, they are always contained in a frame (with a few key exceptions, but that doesn't apply to the A70). [br]
Secondly, precisely pre-cut adhesives don't really exist for the screen, meaning (as seen in the guide), you will need to cut your own with TESA tape. Which, while likely holding the screen on fine, will not work for a water resistant seal.[br]
And finally, it is significantly more work to do a screen replacement without a frame than it is with a frame. Instead of all the steps to remove the screen from the frame, when you've gotten that far, you've got about 1-2 screws to completely release the motherboard, 1-2 screws to completely release the charging board, and then just adhesive for a few components like the battery and vibration motor. Takes a couple minutes.[br]
[br]
Official Samsung screens always come with new small parts such as gaskets around the speaker and thermal paste pre-applied for the processor, but even if you buy 3rd party parts off ebay those transfers only take an extra few minutes.[br]
[br]
In all, I probably spend about 2 times as long doing a screen replacement without a frame versus with a frame, and my time is more valuable than the $10 more I spend on the screen with the frame.