Search for "Subway Surfers v1.0 IPA." This version is the most likely to have a lower firmware requirement. ⚠️ Security Warning
If you still want to attempt an installation on a jailbroken legacy device, community-maintained archives are the best source: Internet Archive: iOS 4.0-4.2 IPA Games Collection Subway Surfers (iOS All Version) repository host older iOS Obscura: Subway Surfers Ipa Ios 4.2.1 BETTER Download
: An on-device tool available in Cydia that can install IPA files directly from your mobile storage. Search for "Subway Surfers v1