Have a phone you love? Get up to $500 when you bring your phone.
$500 via Verizon e-gift card (sent w/in 8 wks). Activation of 4G LTE/5G phone on select Unlimited plans req'd. Line must remain active for 45 days. $500 charge back if service cancelled w/in 12 mos or eligibility req's are no longer met. See vzw.com/bring-your-own-device for details..
Given the memory and processor of that phone, you might try running less processes or apps in the background if at all possible, as well as making sure your wifi speed or data signal is strong. That's really all that I can think of that might help.