I haven't tried it and I don't know. Sorry.
Can you test 3 method I have read (but not tested) , IOS 7.x.x jailbreak is easily so i think developer can test app before buy an apple dev account
Method 1:
Open folder
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/ (or 6.0-7.0,....)
Move this file to desktop to edit:
SDKSettings.plist
Open this file by Xcode, change Value
CODE_SIGNING_REQUIRED to NO and save, move to old folder
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/ (or 6.0-7.0,....)
Open project and change value in
Code Signing Identify to
Don't Code Sign
Done ->Build and have IPA to install on jailbreak Iphone
Method 2:
+ build release
+ Make folder Payload on your desktop
+ View on folder
build of your project copy file .app
+ paste into folder Payload on your desktop
+ compress this payload folder
+ rename it to yourapp.ipa
Method 3:
+ Use Jailcoder to patch Xcode project
NOte:
This IPA want to run on iPhone, your phone must Jailbreak and install AppSync from Cydia
Any one can try it and confirm, if ok we will not buy developer account to test app in iphone