OnePlus usually does a decent job of bringing some of the new features it launches with its latest flagships to older devices. Over the last year, however, the company has failed to release a few such features, even though it publicly announced that the features will be made available on older devices. Our Editor-in-Chief, Mishaal Rahman, recently reached out to the company inquiring about the features that were promised, but not released, for older phones, and here's what he learned:

RAM Boost for OnePlus 5/5T

Back in May 2019, the company announced that a bunch of new OxygenOS features from the OnePlus 7 series would be released for the OnePlus 5/5T/6/6T. A forum post from the time clearly states that the RAM Boost feature, which increases RAM utilization to improve performance, would be released for the OnePlus 5 and 5T. However, over a year since the announcement, the feature hasn't been released on the devices. When asked about the feature, the company said that it won't be released to the OnePlus 5/5T due to a hardware compatibility issue.

Caller identification for OnePlus 3/3T

Early last year, OnePlus debuted an India-exclusive caller identification feature for the OnePlus 6/6T. In a forum post regarding the feature, the company's Global Product Operations Manager, Manu J., revealed that the feature would be released to the OnePlus 3/3T as part of the Android Pie update for the devices. But user reports suggest that the feature wasn't released with the stable Android Pie update for the devices. The company has now confirmed that the feature won't be released for the devices since these devices have passed their maintenance period. For the unaware, the last update for the OnePlus 3 series was pushed out last year.

DC Dimming for the OnePlus 6/6T

The OnePlus 6/6T received DC Dimming support with OxygenOS Open Beta 2315 back in July last year. But while the feature has been available on the beta channel for over a year, it hasn't been released on the stable channel. Since the company has ended Open Beta releases for the two devices, some users are wondering if the company even plans to release the feature on the stable channel. As it turns out, the OnePlus 6/6T won't be receiving DC Dimming on the stable channel due to a hardware compatibility issue.

Along with the features mentioned above, OnePlus also hasn't released one such feature on its latest flagship — the OnePlus 8. If you scroll down to the OnePlus 8 product page on the company's website, you'll find a note that says, "upgrade for 5G or 4G dual SIM support will be implemented via OTA update." However, in the five months since its launch, the OnePlus 8 still hasn't received an OTA update that enables dual SIM support in the US. When asked about the feature, the company revealed that Dual SIM support for the OnePlus 8 will be enabled via an OTA update in the fourth quarter of this year.

Additionally, Mishaal inquired about the one-handed mode for the OnePlus 7 and 7T series, which rolled out in an OxygenOS Open Beta update earlier this year. The rollout was said to be a mistake, with a staff member claiming that it was "unintentionally mentioned in the changelog" and that it would be added "in the next build." However, the feature hasn't been made available since then in any OxygenOS update or on a new device. In response, the company confirmed that its Android 11-based software release, HydrogenOS 11 in China or OxygenOS 11 globally, will feature one-handed mode, even though it's not available in the current beta release.