diff --git a/internal/service/api/handlers/ctx.go b/internal/service/api/ctx.go
similarity index 99%
rename from internal/service/api/handlers/ctx.go
rename to internal/service/api/ctx.go
index 3c38a4b..ebd2106 100644
--- a/internal/service/api/handlers/ctx.go
+++ b/internal/service/api/ctx.go
@@ -1,7 +1,9 @@
-package handlers
+package api
 
 import (
 	"context"
+	"net/http"
+
 	"github.com/ethereum/go-ethereum/ethclient"
 	stateabi "github.com/iden3/contracts-abi/state/go/abi"
 	"github.com/rarimo/passport-identity-provider/internal/config"
@@ -9,7 +11,6 @@ import (
 	"github.com/rarimo/passport-identity-provider/internal/service/issuer"
 	"github.com/rarimo/passport-identity-provider/internal/service/vault"
 	"gitlab.com/distributed_lab/logan/v3"
-	"net/http"
 )
 
 type ctxKey int
diff --git a/internal/service/api/handlers/create_identity.go b/internal/service/api/handlers/create_identity.go
index 500cc6e..2eb7ff4 100644
--- a/internal/service/api/handlers/create_identity.go
+++ b/internal/service/api/handlers/create_identity.go
@@ -25,6 +25,7 @@ import (
 	"github.com/rarimo/certificate-transparency-go/x509"
 	"github.com/rarimo/passport-identity-provider/internal/config"
 	"github.com/rarimo/passport-identity-provider/internal/data"
+	"github.com/rarimo/passport-identity-provider/internal/service/api"
 	"github.com/rarimo/passport-identity-provider/internal/service/api/requests"
 	"github.com/rarimo/passport-identity-provider/resources"
 	"gitlab.com/distributed_lab/ape"
@@ -58,18 +59,18 @@ var algorithmsListMap = map[string]map[string]string{
 func CreateIdentity(w http.ResponseWriter, r *http.Request) {
 	req, err := requests.NewCreateIdentityRequest(r)
 	if err != nil {
-		Log(r).WithError(err).Error("failed to create new create identity request")
+		api.Log(r).WithError(err).Error("failed to create new create identity request")
 		ape.RenderErr(w, problems.BadRequest(err)...)
 		return
 	}
 
 	rawReqData, err := json.Marshal(req.Data)
 	if err != nil {
-		Log(r).WithError(err).Error("failed to marshal create identity request")
+		api.Log(r).WithError(err).Error("failed to marshal create identity request")
 		ape.RenderErr(w, problems.InternalError())
 		return
 	}
-	log := Log(r).WithFields(logan.F{
+	log := api.Log(r).WithFields(logan.F{
 		"user-agent":   r.Header.Get("User-Agent"),
 		"request_data": string(rawReqData),
 	})
@@ -114,7 +115,7 @@ func CreateIdentity(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	cfg := VerifierConfig(r)
+	cfg := api.VerifierConfig(r)
 
 	switch algorithm {
 	case SHA1withECDSA:
@@ -168,7 +169,7 @@ func CreateIdentity(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	masterQ := MasterQ(r)
+	masterQ := api.MasterQ(r)
 
 	claim, err := masterQ.Claim().ResetFilter().
 		FilterBy("user_did", req.Data.ID.String()).
@@ -211,8 +212,8 @@ func CreateIdentity(w http.ResponseWriter, r *http.Request) {
 	}
 
 	var claimID string
-	iss := Issuer(r)
-	vaultClient := VaultClient(r)
+	iss := api.Issuer(r)
+	vaultClient := api.VaultClient(r)
 
 	blinder, err := vaultClient.Blinder()
 	if err != nil {
diff --git a/internal/service/api/handlers/get_gist_data.go b/internal/service/api/handlers/get_gist_data.go
index 9c053d2..1ad1df7 100644
--- a/internal/service/api/handlers/get_gist_data.go
+++ b/internal/service/api/handlers/get_gist_data.go
@@ -10,6 +10,7 @@ import (
 	"github.com/iden3/contracts-abi/state/go/abi"
 	core "github.com/iden3/go-iden3-core/v2"
 	"github.com/iden3/go-iden3-core/v2/w3c"
+	"github.com/rarimo/passport-identity-provider/internal/service/api"
 	"github.com/rarimo/passport-identity-provider/internal/service/api/requests"
 	"github.com/rarimo/passport-identity-provider/resources"
 	"gitlab.com/distributed_lab/ape"
@@ -21,12 +22,12 @@ import (
 func GetGistData(w http.ResponseWriter, r *http.Request) {
 	req, err := requests.NewGetGistDataRequest(r)
 	if err != nil {
-		Log(r).WithError(err).Error("failed to parse get gist data request")
+		api.Log(r).WithError(err).Error("failed to parse get gist data request")
 		ape.RenderErr(w, problems.BadRequest(err)...)
 		return
 	}
 
-	log := Log(r).WithFields(logan.F{
+	log := api.Log(r).WithFields(logan.F{
 		"user-agent":   r.Header.Get("User-Agent"),
 		"user_did":     req.UserDID,
 		"block_number": req.BlockNumber,
@@ -46,7 +47,7 @@ func GetGistData(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	blockNum, err := EthClient(r).BlockNumber(context.Background())
+	blockNum, err := api.EthClient(r).BlockNumber(context.Background())
 	if err != nil {
 		log.WithError(err).Error("failed to get block number")
 		ape.RenderErr(w, problems.InternalError())
@@ -67,7 +68,7 @@ func GetGistData(w http.ResponseWriter, r *http.Request) {
 		blockNum = req.BlockNumber
 	}
 
-	stateContract := StateContract(r)
+	stateContract := api.StateContract(r)
 
 	gistProof, err := stateContract.GetGISTProof(&bind.CallOpts{
 		BlockNumber: new(big.Int).SetUint64(blockNum),
diff --git a/internal/service/api/requests/create_identity.go b/internal/service/api/requests/create_identity.go
index 77573ff..fe655e5 100644
--- a/internal/service/api/requests/create_identity.go
+++ b/internal/service/api/requests/create_identity.go
@@ -3,9 +3,13 @@ package requests
 import (
 	"encoding/json"
 	"net/http"
+	"strconv"
+	"strings"
 
 	"github.com/iden3/go-iden3-core/v2/w3c"
 	snarkTypes "github.com/iden3/go-rapidsnark/types"
+	"github.com/rarimo/passport-identity-provider/internal/service/api"
+	"gitlab.com/distributed_lab/logan/v3"
 	"gitlab.com/distributed_lab/logan/v3/errors"
 )
 
@@ -33,9 +37,52 @@ func NewCreateIdentityRequest(r *http.Request) (CreateIdentityRequest, error) {
 		return request, errors.Wrap(err, "failed to unmarshal")
 	}
 
-	if request.Data.DocumentSOD.EncapsulatedContent[0:2] != "30" {
-		request.Data.DocumentSOD.EncapsulatedContent = "30" + request.Data.DocumentSOD.EncapsulatedContent
+	encapsulatedContent := PrependPrefix(request.Data.DocumentSOD.EncapsulatedContent)
+	if strings.Compare(encapsulatedContent, request.Data.DocumentSOD.EncapsulatedContent) != 0 {
+		api.Log(r).WithFields(logan.F{
+			"encapsulated_content_new": encapsulatedContent,
+			"encapsulated_content_old": request.Data.DocumentSOD.EncapsulatedContent,
+		}).Info("encapsulated content update")
+		request.Data.DocumentSOD.EncapsulatedContent = encapsulatedContent
 	}
 
 	return request, nil
 }
+
+// PrependPrefix - сrunch before Android fix
+func PrependPrefix(data string) string {
+	// Parse by VERSION field
+	subs := strings.Split(data, "0201")
+
+	dataLength := subs[0]
+
+	// recreate the rest of the string without length
+	rest := "0201" + strings.Join(subs[1:], "0201")
+
+	restByteLen := int64(len(rest) / 2)
+
+	actualLength := toHex(restByteLen)
+
+	if restByteLen > 128 && restByteLen < 256 {
+		actualLength = "81" + actualLength
+	}
+	if restByteLen > 256 {
+		actualLength = "82" + actualLength
+	}
+
+	data = "30" + dataLength + rest
+	if strings.Compare(dataLength, actualLength) != 0 {
+		data = "30" + actualLength + rest
+	}
+
+	return data
+}
+
+func toHex(number int64) string {
+	hexStr := strconv.FormatInt(number, 16)
+	if len(hexStr)%2 != 0 {
+		hexStr = "0" + hexStr
+	}
+
+	return hexStr
+}
diff --git a/internal/service/router.go b/internal/service/router.go
index 32342fa..776df33 100644
--- a/internal/service/router.go
+++ b/internal/service/router.go
@@ -6,6 +6,7 @@ import (
 	"github.com/go-chi/chi"
 	stateabi "github.com/iden3/contracts-abi/state/go/abi"
 	"github.com/rarimo/passport-identity-provider/internal/data/pg"
+	"github.com/rarimo/passport-identity-provider/internal/service/api"
 	"github.com/rarimo/passport-identity-provider/internal/service/api/handlers"
 	"github.com/rarimo/passport-identity-provider/internal/service/issuer"
 	"github.com/rarimo/passport-identity-provider/internal/service/vault"
@@ -39,17 +40,17 @@ func (s *service) router() chi.Router {
 		ape.RecoverMiddleware(s.log),
 		ape.LoganMiddleware(s.log),
 		ape.CtxMiddleware(
-			handlers.CtxLog(s.log),
-			handlers.CtxMasterQ(pg.NewMasterQ(s.cfg.DB())),
-			handlers.CtxVerifierConfig(s.cfg.VerifierConfig()),
-			handlers.CtxStateContract(stateContract),
-			handlers.CtxIssuer(issuer.New(
+			api.CtxLog(s.log),
+			api.CtxMasterQ(pg.NewMasterQ(s.cfg.DB())),
+			api.CtxVerifierConfig(s.cfg.VerifierConfig()),
+			api.CtxStateContract(stateContract),
+			api.CtxIssuer(issuer.New(
 				s.cfg.Log().WithField("service", "issuer"),
 				s.cfg.IssuerConfig(),
 				issuerLogin, issuerPassword,
 			)),
-			handlers.CtxVaultClient(vaultClient),
-			handlers.CtxEthClient(ethCli),
+			api.CtxVaultClient(vaultClient),
+			api.CtxEthClient(ethCli),
 		),
 	)
 	r.Route("/integrations/identity-provider-service", func(r chi.Router) {