Unity3D Game crashs on Sony Xperia T 4.3 jelly bean

Hey guys!

I recently added a game to the playstore, and the first days it looked like everything is just fine. Then after a week a user reported a crash and gave me a poor rating because the app crashs on his phone. He uses a Sony Xperia T with android 4.3 jelly bean. He is the only user yet that uses android 4.3. Does anybody know from what this eror might be caused ?

Here the complete crash report:

 java.lang.Error: FATAL EXCEPTION [UnityMain]
 Unity version : 5.0.0f4
 Device model : Sony LT30p
 Device fingerprint: Sony/LT30p/LT30p:4.3/9.2.A.1.205/Mvv_tg:user/release-keys
 
 Caused by: java.lang.Error: signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000048
 Build fingerprint: 'Sony/LT30p/LT30p:4.3/9.2.A.1.205/Mvv_tg:user/release-keys'
 Revision: '0'
 pid: 5039, tid: 5053, name: UnityMain >>> com.fancykobolds.jetpacktomato <<<
 r0 603e9bf0 r1 00000000 r2 00000000 r3 000013bd
 r4 00000000 r5 61525a40 r6 0011238c r7 5f259700
 r8 00000002 r9 aaaaaaab sl 631ad834 fp 00000011
 ip 13bd4001 sp 5f513a10 lr 00000001 pc 5e75b1d8 cpsr 3a67745f
 
 at libunity.0041a1d8(Native Method)
 at libunity.003de9c4(Native Method)
 at libunity.0012d328(Native Method)
 at libunity.0012d734(Native Method)
 at libunity.003c2458(Native Method)
 at libunity.003c2148(Native Method)
 at libunity.00347a90(Native Method)
 at libunity.00347960(Native Method)
 at libunity.00346868(Native Method)
 at libunity.00343f7c(Native Method)
 at libunity.00343c78(Native Method)
 at libunity.004b62ec(Native Method)
 at libunity.004badcc(Native Method)
 at libdvm.dvmPlatformInvoke(dvmPlatformInvoke:112)
 at libdvm.dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)(dvmCallJNIMethod:398)
 at libdvm.00029860(Native Method)
 at libdvm.dvmInterpret(Thread*, Method const*, JValue*)(dvmInterpret:184)
 at libdvm.dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)(dvmCallMethodV:292)
 at libdvm.dvmCallMethod(Thread*, Method const*, Object*, JValue*, ...)(dvmCallMethod:20)
 at libdvm.000579c3(Native Method)
 at libc.__thread_entry(__thread_entry:72)
 at libc.pthread_create(pthread_create:208)

Thanks for any help!!!