ResenderMake Android let it run
Android and the manufacturer's battery manager stop background apps to save power. These pages give the exact path on each brand — and say honestly what no app can do for you.
Huawei and Honor: SMS forwarding stops in the background — App launch settings that fix it
On Huawei and Honor phones (EMUI, Magic OS), SMS forwarding stops until you manage Resender's launch by hand: Auto-launch, Secondary launch and Run in background all on. The exact path, and what older versions call Protected apps.
OnePlus: SMS forwarding stops in the background — OxygenOS battery settings that fix it
On OnePlus phones, OxygenOS stops background apps and SMS forwarding goes quiet until Resender is allowed background activity and auto-launch. The exact path on current OxygenOS, the older Battery optimization screen, and how to check it worked.
OPPO: SMS forwarding stops in the background — ColorOS battery and auto-launch settings
On OPPO phones, ColorOS stops background apps and SMS forwarding goes quiet until Resender is allowed background activity and auto-launch. The exact path on ColorOS, and the Android battery-optimisation switch that goes with it.
Google Pixel: keep SMS forwarding running in the background — the one battery setting to change
Pixel phones run stock Android with no manufacturer battery manager, so one setting is enough: set Resender to Unrestricted battery use. Where it is, why Resender cannot flip it for you, and what to check if emails still arrive late.
realme: SMS forwarding stops when the screen is off — realme UI battery settings
On realme phones, realme UI freezes background apps and SMS forwarding stops until Resender is allowed background activity and auto-launch. The exact path on realme UI, and the Android battery-optimisation switch that goes with it.
Samsung: SMS forwarding stops after a while — the One UI battery settings that fix it
On Samsung phones, One UI puts apps to sleep and SMS forwarding stops until Resender is set to Unrestricted and added to Never sleeping apps. The exact path for Galaxy phones on One UI, and how to check it worked.
vivo and iQOO: SMS forwarding stops in the background — Funtouch OS and OriginOS battery settings
On vivo and iQOO phones, the system restricts background apps and SMS forwarding stops until Resender is set to Unrestricted and allowed to autostart. The exact path on Funtouch OS and OriginOS, including i Manager on older phones.
Xiaomi, Redmi, POCO: SMS forwarding stops in the background — the settings that fix it
On MIUI and HyperOS phones, SMS forwarding stops when the screen is off until you allow autostart, lift the battery restriction and lock the app in Recents. The exact path for Xiaomi, Redmi and POCO, and why no app can do it for you.