r/GearS3

EDIT: I fixed it! Read the bottom for more information.

NOTE: PLEASE READ THE ENTIRE POST BEFORE COMMENTING!! I already tried everything in the pinned posts and some workarounds online. It's not helpful if you give me a useless comment.

Hi everyone, I've been trying for weeks to get third-party apps like Spotify and even first party apps like the Voice Memos app onto my Gear S3 Frontier and I'm completely stuck. Posting here as a last resort because I've already tried everything I can find.

My setup:

• Watch: Samsung Gear S3 Frontier (SM-R760)
• Tizen version: 4.0.0.7
• Firmware: R760XXU2FVG1
• Phone: Samsung Galaxy S21 FE 5G
• Mac for sideloading tools

What I've tried:

1. sdb install via Tizen Studio: connects fine, transfers fine, but every single app hits either error -27 (side loading error) or error -12 (non trusted certificate).

2. Re-signing with a custom cert profile: created a Tizen cert profile in Tizen Studio, re-signed all the wgt/tpk files, still -12.

3. WatcherManager++ APK swap method: the transfer notification fires on my phone and Galaxy Wearable shows it's sending, but nothing ever appears on the watch.

4. Date spoofing: set watch date back to 2021 to bypass cert expiry, still no change.

What DID work:

• Samsung Pay (com.samsung.samsung-pay-app-2.7.5106.wgt) installed perfectly via sdb.

Has anybody else gotten it to work???

And also if you did, it would be great if I could get the exact files you used to try those with my watch.

SOLUTION: I kept getting a signing error. Here's why: I had Tizen Studio installed and continued to use it's version of sdb. The version that it installs for you does not work. Along with that, I had tried to sign apps on my own, and because of this I had certificates in my signing cache. Once deleting Tizen Studio and its corresponding sdb version, I was able to use the original pre-signed packages and successfully install them.

When installing apps, make sure you install the sdb version 2.2.60 (from the XDA forum) and do NOT install Tizen Studio.

Now that the Galaxy Store has pulled Tizen apps and the "core services" sunset date (May 2025) has passed, a lot of us are stuck with a perfectly working Gear S3 Frontier/Classic and no way to reinstall anything after a reset.

I've been archiving the official .wgt packages that were still on the Galaxy Store before it closed — Samsung-signed, untouched, same files you'd download back then. Nothing is repackaged, nothing is cracked. The signatures are intact.

What's on it (free download, no account, no ads):

- 23 Samsung apps (Alarm, Calculator, Calendar, Email, Music, Weather, SmartThings, Camera Controller, PPT Controller, etc.)

- 90+ watch faces (Classic, Digital Dashboard, Solari Board, SzaZs series, MD series, GS Hybrid, etc.)

Site: https://gearS3.jnk.ovh